High-strength testosterone undecanoate compositions

ABSTRACT

The present disclosure is drawn to pharmaceutical compositions and oral dosage capsules containing testosterone undecanoate, as well as related methods. The capsule includes a capsule shell and a capsule fill. The capsule fill can include a solubilizer and about 14 wt % to about 35 wt % testosterone undecanoate based on the total capsule fill. The oral dosage capsule is such that when a single oral administration to a male subject of one or more capsules with a total testosterone undecanoate daily dose of about 350 mg to about 650 mg it provides a ratio of serum testosterone C max  to serum testosterone C ave  of about 2.7 or less. In yet another embodiment, a method for providing a serum concentration of testosterone within a target serum testosterone concentration C ave  range for a male subject is provided.

PRIORITY DATA

This application is a continuation U.S. patent application Ser. No.15/270,357, filed Sep. 20, 2016, which is a continuation U.S. patentapplication Ser. No. 14/952,796, filed Nov. 25, 2015, now issued as U.S.Pat. No. 9,480,690, which is a continuation of U.S. patent applicationSer. No. 14/691,229, filed on Apr. 20, 2015, now issued as U.S. Pat. No.9,205,057, which is a continuation of U.S. patent application Ser. No.13/485,807, filed on May 31, 2012, now issued as U.S. Pat. No.9,034,858, which is a continuation-in-part of U.S. patent applicationSer. No. 12/957,206, filed on Nov. 30, 2010, and of Patent CooperationTreaty Application Serial No. PCT/US2011/062538, filed on Nov. 30, 2011,each of which are incorporated herein by reference.

FIELD OF THE INVENTION

The present invention relates to testosterone undecanoate containingpharmaceutical compositions and oral dosage capsules as well asassociated methods. Accordingly, this invention involves the fields ofchemistry, pharmaceutical sciences, medicine and other health sciences.

BACKGROUND OF THE INVENTION

Male hypogonadism is a serious condition affecting mostly aging men. Thecommon reasons for hypogonadism in men could be physiologicalabnormality involving among other factors, improper functioning orgrowth of the gonads and/or the pituitary-hypothalamus regulatorysystems, and aging. Many of the abnormalities that are identified to becommonly associated with the low or decreased testosterone levelsinclude impaired sexual function and/or libido, metabolic syndrome whichmay be a combination of abdominal obesity, high blood pressure, insulinresistance, lipid disorders; high risk of cardiovascular diseases;reduced bone mass/mineral density and muscle weakness and ordegeneration affecting the musculoskeletal system. Other effects of lowtestosterone levels include negative changes in body composition,depression and other psychological disorders. The average human maleproduces 4-7 mg of testosterone per day in a circadian pattern, withmaximal plasma levels attained in early morning and minimal levels inthe evening. It is generally recognized that in a normal adult man ofage 17 to 54 years, the serum total testosterone (T) is between about300 ng/dL to about 1100 ng/dL and this range is referred to as theeugonadal range. Restoration of testosterone levels to the eugonadalrange typically corrects many of the cited clinical abnormalitiesassociated with hypogonadism or low testosterone levels.

While oral administration is the most preferred and patient friendlyroute for administration, the effective oral delivery of testosterone astestosterone and its esters remains a challenge. This is due toextremely poor bioavailability of testosterone, which requires very highdosing as well as frequent dosing due to the short serum half-life.These problems with orally administered testosterone products areprimarily due to first pass metabolism. Further, direct oral delivery oftestosterone has also been known to cause enzyme induction resulting inpotential drug-drug interactions.

Currently, modified testosterones, in form of a methyl analogue oftestosterone, and as an undecanoate ester, testosterone undecanoate (TU)are available for oral administration for patients in need oftestosterone therapy. However, liver damage including cholestasis,peliosis hepatitis, nodular regenerative hyperplasia, and primaryhepatic tumors has been reported with use of methyl testosterone.Testosterone undecanoate is a prodrug which gets converted totestosterone in vivo. Testosterone undecanoate containing products areavailable in some countries as liquid filled soft-gelatin capsulecontaining 40 mg of fully solubilized testosterone undecanoate.Testosterone undecanoate is extremely lipophilic (calculated log P of˜6.5) with a water solubility of <0.3 ng/ml and a melting point around62° C. It is generally believed that in order to promote lymphaticabsorption for better safety profile and to facilitate effective oraldelivery of testosterone undecanoate, the testosterone undecanoate mustbe presented in a bioacceptable solubilizer. Accordingly, researchcontinues into the development of testosterone oral delivery productsthat can have high drug load and provide for practical unit oral dosageforms.

SUMMARY OF THE INVENTION

The present disclosure is drawn to pharmaceutical compositions and oraldosage capsules containing testosterone undecanoate, as well as relatedmethods. In one embodiment, a pharmaceutical capsule for oral deliveryis provided. The capsule includes a capsule shell and a capsule fill.The capsule fill can include a solubilizer and about 14 wt % to about 35wt % testosterone undecanoate based on the total weight of the capsulefill. In some aspects, the oral dosage capsule is such that upon asingle oral administration to a male subject of one or more capsuleswith a total testosterone undecanoate daily dose of about 350 mg toabout 650 mg it provides a ratio of serum testosterone C_(max) to serumtestosterone C_(ave) of about 2.7 or less.

In another embodiment, a method for providing a serum concentration oftestosterone within a target serum testosterone concentration C_(ave)range for a male subject is provided. The method can include the step oforally administering to the male subject a daily dose of a testosteroneundecanoate-containing composition. The testosterone undecanoate cancomprise about 14 wt % to about 35 wt % of the testosteroneundecanoate-containing composition and the daily dose provided can beabout 350 mg to about 420 mg of testosterone undecanoate to the malesubject.

In yet a further embodiment, a method for providing a serumconcentration of testosterone within a target serum testosteroneconcentration C_(ave) range for a male subject is provided. The methodcan include the step of orally administering to the male subject aninitial regimen including a daily dose of a testosteroneundecanoate-containing composition. The testosterone undecanoate cancomprise about 14 wt % to about 35 wt % of the testosteroneundecanoate-containing composition and the daily dose provided can beabout 350 mg to about 650 mg of testosterone undecanoate to the malesubject. After the initial regimen, the method can include a step ofdetermining the serum testosterone concentration for the male subject onat least one titration node day within the initial regimen. The methodfurther can include the step of orally administering to the male subjecta maintenance regimen including a daily dose of testosteroneundecanoate-containing composition that comprises about 14 wt % to about35 wt % of the testosterone undecanoate. The maintenance regimen canprovide a daily dose of testosterone undecanoate to the subject based onthe serum testosterone concentration determined by a titration metric onthe at least one titration node day of the initial regimen and the saidmaintenance daily dose can be sufficient to provide a serum testosteroneplasma concentration within the target range. The method can provide asteady state ratio of serum testosterone C_(max) to C_(ave) of 2.7 orless.

The applicants of the present invention have found that capsule fillcompositions with a lower TU loading of less than 14% w/w are unsuitablefor optimal activity due to inadequate bioavailability which also leadsto larger dosage forms/doses for therapy in treatment of symptomsrelated to male hypogonadism. Consistent with the compositions of thepresent invention, higher loading dosage forms, i.e. those with ≥14% w/wof TU based on total capsule fill, resulted in a superior C_(ave) per mgtestosterone undecanoate administered, thus providing improvedperformance of oral testosterone undecanoate as a testosterone therapy.

Further, it was also found that it is not necessary to fully dissolvethe testosterone undecanoate in the capsule fill, but rather only aboutat least 80 wt % of the testosterone undecanoate may need to bedissolved with at least 5% of testosterone undecanoate possibly needingto remain undissolved in order to achieve a desired and efficientC_(ave) per mg of testosterone undecanoate administered. Therefore, inone embodiment in order to facilitate improved activity, an oral capsulewith TU loading in the range of about 14 wt % to about 18% is providedin which no more than 80 wt % of the TU in the capsule fill isdissolved. This capsule can result in dose normalized C_(max) suggestingsuperior bioavailability yet manageable C_(max) for effectivetherapeutics.

DETAILED DESCRIPTION

Before the present testosterone undecanoate compositions, oral dosagecapsules and related methods of use are disclosed and described, it isto be understood that this invention is not limited to the particularprocess steps and materials disclosed herein, but is extended toequivalents thereof, as would be recognized by those ordinarily skilledin the relevant arts. It should also be understood that terminologyemployed herein is used for the purpose of describing particularembodiments only and is not intended to be limiting.

It should be noted that, the singular forms “a,” “an,” and, “the”include plural referents unless the context clearly dictates otherwise.Thus, for example, reference to “an excipient” includes reference to oneor more of such excipients, and reference to “the carrier” includesreference to one or more of such carriers.

Definitions

As used herein, the term “treatment,” when used in conjunction with theadministration of pharmaceutical compositions and oral dosage capsulescontaining testosterone undecanoate, refers to the administration of theoral dosage capsules and pharmaceutically acceptable composition tosubjects who are either asymptomatic or symptomatic. In other words,“treatment” can both be to reduce or eliminate symptoms associated witha condition present in a subject, or it can be prophylactic treatment,i.e. to prevent the occurrence of the symptoms in a subject. Suchprophylactic treatment can also be referred to as prevention of thecondition.

As used herein, the terms “formulation” and “composition” are usedinterchangeably and refer to a mixture of two or more compounds,elements, or molecules. In some aspects the terms “formulation” and“composition” may be used to refer to a mixture of one or more activeagents with a carrier or other excipients. Furthermore, the term “dosageform” can include one or more formulation(s) or composition(s) providedin a format for administration to a subject. When any of the above termsis modified by the term “oral” such terms refer to compositions,formulations, or dosage forms formulated and intended for oraladministration to subjects.

As used herein, the term “fatty acid” refers to unionized carboxylicacids with a long aliphatic tail (chain), either saturated orunsaturated, conjugated or non-conjugated.

Unless otherwise specified, the term C₈ to C₂₂ fatty acid glyceridesrefers to a mixture of mono-, di-, and/or tri-glycerol esters of mediumto long chain (C₈ to C₂₂) fatty acids.

As used herein, the term “dispersant” refers to any pharmaceuticallyacceptable additive that enables the contents of the compositions and/ororal dosage capsules to disperse in an aqueous medium. The extent ofdispersion in an aqueous medium can be determined spectrophotometricallyfrom the absorbance exhibited by the dispersion at a wavelength of about400 nm. For example, the dispersion of the composition (with or withoutthe testosterone undecanoate) of the current invention in about 0.2 mMsodium lauryl sulphate solution in water, has an absorbance of about 0.6or less at about 400 nm wavelength, when the ratio of the composition tothe sodium lauryl sulphate solution is about 1:2000. In a specificembodiment, the dispersion of the composition (with or without thetestosterone undecanoate) of the current invention in about 0.2 mMsodium lauryl sulphate solution in water, has an absorbance of about 0.3or less at about 400 nm wavelength, when the ratio of the composition tothe sodium lauryl sulphate solution is about 1:5000. In anotherembodiment, the composition can produce a fine dispersion upon dilutionin an aqueous medium without the need of a hydrophilic surfactant.

Further, as used herein, the dispersant of the current invention is atleast one selected from the group of hydrophilic surfactant orlipophilic surfactant. In one embodiment, the dispersant includes ahydrophilic surfactant.

As used herein, the term “solidifying agent” or “solidifying additive”are used interchangeably and refer to a pharmaceutically acceptableadditive that is in a solid physical state at 20° C. Similarly, a “solidlipophilic additive” refers to a lipophilic compound or component thatis in a solid physical state at 20° C. and/or renders the composition ordosage form non-liquid, such as solid or semi-solid.

As used herein, the terms “solubilized” and “solubility,” when used todescribe the state of testosterone undecanoate with respect to acomposition and/or capsule fill, refer to the absence of testosteroneundecanoate crystals in the composition or oral dosage form whenobserved under hot-stage microscope over a temperature of about 25° C.to about 65° C., or the absence of crystalline testosterone undecanoatemelting related peak (about 62 to about 65° C.) when the composition ororal dosage form is subjected to differential scanning calorimetry.Similarly, the solubility of testosterone undecanoate in a particularcompound, e.g. a solubilizer, is the amount of testosterone undecanoatedissolved to form a visibly clear solution at a specified temperaturesuch as about 25° C. or about 37° C. With this definition in mind,compositions having crystalline forms of testosterone undecanoate atabout room temperature would be considered to have an unsolubilizedfraction and a solubilized fraction of testosterone undecanoate whichfraction includes testosterone undecanoate in a solid state that is notcrystalline such as amorphous and solid solution which are solubilizedbut undissolved.

As used herein, “undissolved” or “non-dissolved” can be usedinterchangeably and when one is used to describe the state oftestosterone undecanoate with respect to a composition and/or capsulefill refers to the testosterone undecanoate in a non-liquid testosteroneundecanoate-containing composition that is solubilized (such asnon-crystalline) and non-solubilized such as crystalline TU. Thesolubility of TU in the composition can be estimated based on theindividual solubility in the composition components. For solubilizersthat are viscous or non-liquid at room temperature, TU solubility in thecomposition at room temperature (RT) may be estimated based on theobserved values at higher temperature such as at 37° C.

As used herein, “dissolved” when used to describe the state oftestosterone undecanoate (TU) with respect to a composition or capsulefill refers to a testosterone undecanoate-containing liquid solutionhaving no undissolved testosterone undecanoate.

As used herein, the term “lipophilic,” refers to compounds that are notfreely soluble in water; and the term “lipophilic surfactant” refers tosurfactants that have HLB values of about 10 or less. Conversely, theterm “hydrophilic” refers to compounds that are soluble in water; andterm “hydrophilic surfactant” refers to surfactants that have HLB valuesof more than about 10.

As used herein, the term “ionizable fatty acid” refers to a fatty acidcompound that changes its HLB as a function of pH. For example oleicacid is predominantly lipophilic at lower pH values (such as those foundin the stomach) but becomes a predominantly hydrophilic at higher pHvalues (such as those found in the intestine).

As used herein, “subject” refers to a mammal that may benefit from theadministration of a drug composition or method of this invention.Examples of subjects include humans. In one aspect, the subject can be ahuman male. In another embodiment, the subject can be a hypogonadalmale. As used herein, the testosterone deficiency or hypogonadism in amale human subject (hypogonadal male) refers to a condition wherein theaverage baseline plasma testosterone concentration (T-C_(avg-B)) isabout 300 ng/dL or less. However in some instances, testosteronedeficiency or hypogonadism in a male human subject refers to a conditionwherein the average baseline plasma testosterone concentration is about400 ng/dL or less.

A used herein, a “responder” is a subject who responds to exogenous oraltestosterone undecanoate therapy. “Responder analysis” is the assessmentof the effectiveness of testosterone undecanoate therapy in a group ofsubjects deemed to get benefits of oral TU therapy.

As used herein, “group” or “group of subjects” refers to a collection ofat least 24 human male subjects who receive and respond to exogenousoral administration of the compositions disclosed herein, namelytestosterone undecanoate-containing compositions. In one aspect, thegroup can include at least 100 or at least 300 male subjects. In anotheraspect, the group can include at least 1000 male subjects. In anotherembodiment, the subjects can be hypogonadal subjects.

The term “oral administration” represents any method of administrationin which an active agent can be administered by swallowing, chewing, orsucking of the dosage form. The composition of the current inventionscan be admixed with food or drink prior to being orally consumed.

As used herein, a “dosing regimen” or “regimen” such as an “initialdosing regimen” or a “maintenance dosing regimen” refers to how, when,how much, and for how long a dose of the compositions of the presentinvention can be administered to a subject. For example, an initialdosing regimen for a hypogonadal male subject may provide for a totaldaily dose of 600 mg administered in two divided doses at least 12 hoursapart (e.g. once with breakfast and once with dinner) with meals havingabout 25-55 g of fat content repeated daily for 30 days.

As used herein, “daily dose” refers to the amount of active agent (e.g.testosterone undecanoate) administered to a subject over a 24 hourperiod of time. The daily dose can be administered two or moreadministrations during the 24 hour period. In one embodiment, the dailydose provides for two administrations in a 24 hour period. With this inmind, an “initial dose” or initial daily dose” refers to a doseadministered during the initial regimen or period of a dosing regimen.An initial dose includes both the very first dose during the initialregimen as well as the subsequent doses during the same initial regimen.Similarly, a “maintenance dose” or “maintenance daily dose” refers to adose administered during a maintenance regimen of a dosing regimen. Itis worth noting that the maintenance dose follows a dose titration basedon the serum testosterone determination on a titration node day, howeverthe maintenance dose does not need to be of a different quantity as theinitial dose or the previous maintenance dose (in the case of multipletitrations).

As used herein, “non-liquid” when used to refer to the state of acomposition disclosed herein refers to the physical state of thecomposition as being a semi-solid or solid.

As used herein, “solid” and “semi-solid” refers to the physical state ofa composition that supports its own weight at standard temperature andpressure, and has adequate viscosity or structure to not freely flow.Semi-solid materials may conform to the shape of a container underapplied pressure.

As used herein, “titration” or “dose titration” or “dose adjustment” areused interchangeably and refer to an increase or decrease of the totaldaily dose of testosterone undecanoate administered to a subject,typically based on the response of the subject to the exogenousadministered testosterone undecanoate. The dose can be increased ordecreased based on the measurement of serum testosterone concentrationafter a steady state has been achieved.

As used herein, “steady state” refers to the achievement of a stableresponse in serum total testosterone levels to exogenously administeredtestosterone undecanoate, typically achieved after at least 15 daysfollowing the start of a dosing regimen.

In some embodiments, the titration can also include the adjustment ofthe way the total daily dose is administered such as whether it isadministered as two or three doses within a 24 hour period, whether itis administered with a meal, with a meal with a particular fat content,or at a particular hour of the day.

As used herein, “initial daily dose” (IDD) or “Daily dose of the initialregimen” is a dose of testosterone undecanoate administered daily to asubject in need of testosterone therapy. The initial daily dose may beadministered in two or more intervals over a 24 hour period, e.g.twice-a-day. Similarly, “maintenance daily dose” or “daily dose of themaintenance regiment” is a dose of testosterone undecanoate administereddaily to a subject in need of testosterone therapy as determined basedon measurement of the titration node day titration metric and is thedaily dose going forward within a few days of measurement unless a dosechange is needed based on a another titration node day measurements.During a maintenance regime there may be two or more daily dosesadministered which at some point during the regime would be consideredto be the maintenance daily dose.

As used herein, “titration node” or “titration node day” are usedinterchangeably and refer to a day on which a serum sample is drawn froma subject for measurement of the serum testosterone concentrations inorder to determine whether a testosterone undecanoate dose titration isnecessary and what the titration type might need to be. The measuredserum testosterone levels may also be used to determine dose a titrationmetric to be utilized in deciding dose titration needs for an individualsubject. As dosing regimens can include one or more titration node daythe term may refer to a first titration node during a dosing regimen(e.g. between the initial dosing regimen and the maintenance dosingregimen) or it can refer to a subsequent titration node day between amaintenance dosing regimen and a subsequent maintenance dosing regimen.

As used herein, “titration day” refers to the day when administration ofa newly titrated (adjusted) dose is initiated. It should be noted thatone or more titrations can be conducted to arrive at a maintenance dailydose in a maintenance regimen. Thus, the maintenance daily dose andregimen is considered to be the dose based on the last or most recenttitration.

As used herein, “titration metric” is a pharmacokinetic (PK) parameterdetermined from a serum sample on a titration node day. The PK parameterused as the titration metric can include the serum testosterone C_(max),C_(avg), C_(min), C_(pre-dose) or C_(t) (serum concentration at aparticular time of day). The titration metric can be used to aid in thedetermination of whether a dose titration is necessary, its magnitude,and other factors possibly included in the titration adjustment.

As used herein, the terms “release” and “release rate” are usedinterchangeably to refer to the discharge or liberation of a substance,including without limitation a drug, from the dosage form into asurrounding environment such as an aqueous medium either in vitro or invivo.

As used herein, an “effective amount” or a “therapeutically effectiveamount” of a drug refers to a non-toxic, but sufficient amount of thedrug, to achieve therapeutic results in treating a condition for whichthe drug is known to be effective. It is understood that variousbiological factors may affect the ability of a substance to perform itsintended task. Therefore, an “effective amount” or a “therapeuticallyeffective amount” may be dependent in some instances on such biologicalfactors. Further, while the achievement of therapeutic effects may bemeasured by a physician or other qualified medical personnel usingevaluations known in the art, it is recognized that individual variationand response to treatments may make the achievement of therapeuticeffects a somewhat subjective decision. The determination of aneffective amount is well within the ordinary skill in the art ofpharmaceutical sciences and medicine. See, for example, Meiner andTonascia, “Clinical Trials: Design, Conduct, and Analysis,” Monographsin Epidemiology and Biostatistics, Vol. 8 (1986), incorporated herein byreference.

As used herein, the term “delayed release” refers to the release into anaqueous solution of the testosterone undecanoate from the composition ororal dosage form in a time delayed manner attributed either to theinherent nature of the composition or to a coating which may surroundthe composition or the oral dosage form. A traditional gelatin ornon-gelatin non-enteric capsule shell does not alone constitute adelayed release mechanism. In one embodiment, the delayed release issuch that about 20% or less of the testosterone undecanoate is releasedwithin the first 15 minutes after the composition is contacted by theaqueous solution.

The terms “plasma testosterone concentration,” “testosteroneconcentration in the blood,” and “serum testosterone concentration” areused interchangeably and refer to the “total” testosterone concentrationwhich is the sum of the bioavailable testosterone including free andprotein-bound testosterone concentrations. As with any bio-analyticalmeasure, for increased consistency the method employed to measureinitial serum testosterone levels should be consistent with the methodused to monitor and re-measure serum testosterone levels during clinicaltesting and testosterone therapy for a subject. Unless otherwise stated,“testosterone concentration” refers to serum total testosteroneconcentration.

As used herein, of the average serum testosterone concentration can bedetermined using methods and practices known in the art. For example,the average baseline plasma testosterone concentration of a human maleis the arithmetic mean of the total plasma testosterone concentrationsdetermined on at least two consecutive time points that are reasonablyspaced from each other, for example from about 1 hour to about 168 hoursapart. In a particular case, the plasma testosterone concentration canbe determined on at least two consecutive times that are about 12 hoursto about 48 hours apart. In another particular method, the plasmatestosterone concentration of the human male can be determined at a timebetween about 5 o'clock and about 11 o'clock in the morning. Further,the plasma testosterone concentration can be the determined by standardanalytical procedures and methods available in the art, such as forexample, automated or manual immunoassay methods, liquid chromatographyor liquid chromatography-tandem mass spectrometry (LC-MSMS) etc.

As used herein, the term AUC_(0-t) is the area under the curve of aplasma-versus-time graph determined for the analyte from the time 0 totime “t”.

As used herein, the term “C_(avg),” “C_(ave),” or “C-average” are usedinterchangeably, and is determined as the AUC_(0-t) or the mean AUCdivided by the time period (t). For example, C_(avg-8h) is the averageplasma concentration over a period of 8 hours post-dosing determined bydividing the AUC₀₋₈ value by 8. Similarly, C_(avg-12h) is the averageplasma concentration over a period of 12 hours post-dosing determined bydividing the AUC₀₋₁₂ value by 12; C_(avg-24h) is the average plasmaconcentration over a period of 24 hours post-dosing determined bydividing the AUC_(0-24h) value by 24, and so on. Unless otherwisestated, all C_(ave) values are considered to be C_(ave-24h).

As used herein, “C_(t)” refers to the serum concentration oftestosterone at time “t” prior to or after administration of the dosageof the current invention. The time “t” is generally in hours, unlessotherwise specified. For example, a C_(t) of “C_((−2 to 0)) refers toserum testosterone concentration measured in sample collected betweenthe time of about 2 hours before and just immediately prior to dosageadministration to the subject tested. Similarly, C_(t) of “C_((2 to 4))”refers to serum testosterone concentration measured in sample collectedbetween the time of about 2 hours and 4 hours after administration of adosage to the subject tested.

As used herein “SIF” or “simulated intestinal fluid” refers to“intestinal fluid, simulated TS” in accordance with the USP. In oneembodiment, the SIF does not contain pancreatic enzyme. In anotherembodiment, SIF may be a fed or fasted simulated intestinal aqueoussolution comprising phosphatidyl choline and from about 2 mM to 20 mMbile salts.

As used herein “SGF” or “simulated gastric fluid” refers to “Gastricfluid, Simulated TS” in accordance with the USP. In one embodiment, theSGF does not contain the enzyme pepsin. In another embodiment, the SGFmay also be a simple 0.1 N HCl solution in water.

As used herein, “free of” or “substantially free of” of a particularcompound or compositions refers to the absence of any separately addedportion of the referenced compound or composition. Free of orsubstantially free of can include the presence of 1 wt % or less (basedon total composition weight) of the referenced compound which may bepresent as a component or impurity of one or more of the ingredients.

As used herein, the term “about” is used to provide flexibility to anumerical range endpoint by providing that a given value may be “alittle above” or “a little below” the endpoint. As used herein, aplurality of items, structural elements, compositional elements, and/ormaterials may be presented in a common list for convenience. However,these lists should be construed as though each member of the list isindividually identified as a separate and unique member. Thus, noindividual member of such list should be construed as a de factoequivalent of any other member of the same list solely based on theirpresentation in a common group without indications to the contrary.

As used herein, a plurality of items, structural elements, compositionalelements, and/or materials may be presented in a common list forconvenience. However, these lists should be construed as though eachmember of the list is individually identified as a separate and uniquemember. Thus, no individual member of such list should be construed as ade facto equivalent of any other member of the same list solely based ontheir presentation in a common group without indications to thecontrary.

Concentrations, amounts, levels and other numerical data may beexpressed or presented herein in a range format. It is to be understoodthat such a range format is used merely for convenience and brevity andthus should be interpreted flexibly to include not only the numericalvalues explicitly recited as the limits of the range, but also toinclude all the individual numerical values or sub-ranges or decimalunits encompassed within that range as if each numerical value andsub-range is explicitly recited. As an illustration, a numerical rangeof “about 1 to about 5” should be interpreted to include not only theexplicitly recited values of about 1 to about 5, but also includeindividual values and sub-ranges within the indicated range. Thus,included in this numerical range are individual values such as 2, 3, and4 and sub-ranges such as from 1-3, from 2-4, and from 3-5, etc., as wellas 1, 2, 3, 4, and 5, individually. This same principle applies toranges reciting only one numerical value as a minimum or a maximum.Furthermore, such an interpretation should apply regardless of thebreadth of the range or the characteristics being described.

Invention

Reference will now be made in detail to preferred embodiments of theinvention. While the invention will be described in conjunction with thepreferred embodiments, it will be understood that it is not intended tolimit the invention to those preferred embodiments. To the contrary, itis intended to cover alternatives, variants, modifications, andequivalents as may be included within the spirit and scope of theinvention as defined by the appended claims.

In one embodiment, a pharmaceutical capsule for oral delivery isprovided. The capsule includes a capsule shell and a capsule fill. Thecapsule fill can include a solubilizer and about 14 wt % to about 35 wt% testosterone undecanoate based on the total weight of capsule fill.The oral dosage capsule is such that when a single oral administrationto a male subject of one or more capsules with a total testosteroneundecanoate daily dose of about 350 mg to about 650 mg it provides aratio of serum testosterone C_(max) to serum testosterone C_(ave) ofabout 2.7 or less.

The compositions and oral dosage capsules of the present invention canbe used to treat subjects, particularly human males, or even moreparticularly males who suffer from testosterone deficiency orhypogonadism. Accordingly, in one embodiment of the present invention, amethod for providing a serum concentration of testosterone within atarget serum testosterone concentration C_(ave) range for a male subjectis provided. The method includes the step of orally administering to themale subject a daily dose of a testosterone undecanoate-containingcomposition. The testosterone undecanoate comprises about 14 wt % toabout 35 wt % of the testosterone undecanoate-containing composition andthe daily dose provides about 350 mg to about 420 mg of testosteroneundecanoate to the male subject. In one specific embodiment, thetestosterone undecanoate comprises about 14 wt % to about 18 wt % of thetestosterone undecanoate-containing composition.

Testosterone deficiency is typically associated with a particularcondition that is the source or causes the deficiency. The compositionsand oral dosage capsules of the present invention can be used to treatany condition associated with testosterone deficiency, includingcomplete absence, of endogenous testosterone. Examples of conditionsassociated with testosterone deficiency that can be treated using theoral dosage capsules and/or compositions of the present inventioninclude, but are not limited to congenital or acquired primaryhypogonadism, hypogonadotropic hypogonadism, cryptorchidism, bilateraltorsion, orchitis, vanishing testis syndrome, orchidectomy,Klinefelter's syndrome, post castration, eunuchoidism, hypopituitarism,endocrine impotence, infertility due to spermatogenic disorders,impotence, male sexual dysfunction (MSD) including conditions such aspremature ejaculation, erectile dysfunction, decreased libido, and thelike, micropenis and constitutional delay, penile enlargement, appetitestimulation, testosterone deficiency associated with chemotherapy,testosterone deficiency associated with toxic damage from alcohol,testosterone deficiency associated with toxic damage from heavy metal,osteoporosis associated with androgen deficiency, and combinationsthereof.

Other conditions that can be treated by the compositions and oral dosageforms disclosed herein include idiopathic gonadotropin, LHRH deficiency,or pituitary hypothalamic injury from tumors, trauma, or radiation.Typically, these subjects have low serum testosterone levels but havegonadotropins in the normal or low range. In one embodiment, thecompositions or oral dosage forms may be used to stimulate puberty incarefully selected males with clearly delayed puberty not secondary topathological disorder. In another embodiment, the compositions and oraldosage forms may be used in female-to-male transsexuals in order tomaintain or restore male physical and sexual characteristics includingbody muscle mass, muscle tone, bone density, body mass index (BMI),enhanced energy, motivation and endurance, restoring psychosexualactivity etc. In some embodiments, the testosterone undecanoatecompositions and oral dosage capsules may be useful in providinghormonal male contraception.

Additionally, testosterone therapy can also be used to improve thequality of life of subjects suffering from conditions such as decreasedlibido, diminishing memory, anemia due to marrow failure, renal failure,chronic respiratory or cardiac failure, steroid-dependent autoimmunedisease, muscle wasting associated with various diseases such as AIDS,preventing attacks of hereditary angioedema or urticaria; andropause,and palliating terminal breast cancer. In some situations, certainbiomarkers such as for example, increased SHBG levels, can be used todiagnose a subject who may be in need of testosterone therapy. Thesebiomarkers can be associated with conditions/disease states such asanorexia nervosa, hyperthyroidism, hypogonadism, androgeninsensitivity/deficiency, alcoholic hepatic cirrhosis, primary biliarycirrhosis, and the like.

Subjects that can be treated by the testosterone undecanoatecompositions and oral dosage capsule of the present disclosure can beany human male in need thereof. In particular, in one embodiment, thehuman male may be at least 14 years of age. In another embodiment, thehuman male is an adult of at least age 30. In a further embodiment, thesubject can be an adult male of at least age 50. In yet a furtherembodiment, the subject can be an adult male of at least age 60.

As discussed above, the compositions and oral dosage capsules disclosedherein can be used to treat testosterone deficiency in human males. Inone embodiment, the human male being treated can have an averagebaseline plasma testosterone concentration of about 400 ng/dL or less.In another embodiment, the human male being treated can have an averagebaseline plasma testosterone concentration of about 350 ng/dL or less.In another embodiment, the human male being treated can have an averagebaseline plasma testosterone concentration of about 300 ng/dL or less.In another embodiment, the human male being treated can have an averagebaseline plasma testosterone concentration of about 250 ng/dL or less.In still another embodiment, the human male being treated can have anaverage baseline plasma testosterone concentration of about of about 190ng/dL or less. In still a further embodiment, the human male has anaverage baseline plasma testosterone concentration of about 400 ng/dL orless, along with a co-morbid condition of insulin resistance.

Further, there are several biomarkers that can be used to identifypatients who need testosterone therapy through the administration of thecompositions and/or dosage forms of the current invention. Accordingly,in one embodiment, the human male being treated can have a low densitylipoproteins (LDL) level in greater than about 130 mg/dL of blood. Inanother embodiment, the human male being treated can have a high densitylipoproteins (HDL) level less than about 40 mg/dL of blood. In stillanother embodiment, the human male being treated can have a totalcholesterol level greater than about 220 mg/dL of blood. In yet afurther embodiment, the human male being treated can have an average TG(triglycerides) levels greater than 250 mg/dL of blood. In oneembodiment, the testosterone undecanoate dosage forms of the currentinvention can be administered to human male whose bioavailable or freeor un-bound plasma estradiol levels are about 20 pg/mL or less. Inanother embodiment, dosage forms of the current invention can beadministered to human male who has a ratio of the bioavailable or freeor unbound plasma testosterone level to the bioavailable or free orun-bound plasma estradiol level at about 100 or less.

The testosterone undecanoate compositions and oral dosage capsules ofthe current invention can be administered orally to a human male who hasan average body mass index (BMI) of about 28 kg/m² or more. In anotherembodiment, the human male has an average BMI of about 30 kg/m² or more.In another embodiment, the human male has an average BMI of about 37kg/m² or more. In a further embodiment, the subject male being treatedcan have a serum sex hormone binding globulin (SHBG) levels of about 40nmol/L or more. In yet another embodiment, the human male being treatedcan have a serum SHBG levels of about 60 nmol/L or more.

It was found that the pharmaceutical compositions and oral dosagecapsules of the present invention have the ability to provide forincreased stability of the testosterone undecanoate present in theformulation. In particular, the pharmaceutical compositions and oraldosage capsules of the present invention can provide for superiorstability with respect to the degradation of the testosteroneundecanoate that can occur during storage as compared to otherformulation containing lower testosterone undecanoate concentration. Inone embodiment, the pharmaceutical compositions and oral dosage capsulesof the present invention can have increased stability such that, whenstored for a period of at least three months there is at least 20% lessdegradation of the testosterone undecanoate as compared to testosteroneundecanoate containing compositions having less than 14 wt %testosterone undecanoate. In another embodiment, the pharmaceuticalcompositions and oral dosage capsules of the present invention can haveincreased stability such that, when stored for a period of at leastthree months there is at least 20% less degradation of the testosteroneundecanoate as compared to testosterone undecanoate containingcompositions having less than 16 wt % testosterone undecanoate.

Further, it has been discovered that the pharmaceutical compositions andoral dosage capsules disclosed herein can provide therapeuticallyeffective treatment without the need to include oils, triglycerides,and/or hydrophilic surfactants. Accordingly, in one embodiment, thepharmaceutical compositions and oral dosage capsules can be free of oil.In another embodiment, the pharmaceutical composition and oral dosagecapsules can be free of triglycerides. In one embodiment, thecomposition or capsule fill can comprise 25 wt % or less of totaltriglycerides. In one embodiment, the composition or capsule fill can befree of ionizable fatty acids. In another embodiment, the composition orcapsule fill can be free of oleic acid. Without wishing to be bound bytheory, it is believed that testosterone undecanoate-containingcompositions or capsule fill that comprise greater than 25 wt %triglycerides have a higher dependence on digestion upon oraladministration than do those in which the triglycerides comprise 25 wt %or less of the total composition or capsule fill. In one embodiment, thecapsule fill can comprise 15 wt % or less of triglycerides. In yetanother embodiment, the capsule fill can comprise 10 wt % or less oftriglycerides. In yet a further embodiment, the capsule fill cancomprise 5 wt % or less of triglycerides.

In yet a further embodiment, the pharmaceutical compositions and oraldosage capsules can be free of hydrophilic surfactants. In yet a furtherembodiment, the composition can include a hydrophilic surfactant as adispersant and the hydrophilic surfactant can be present in an amountsuch that it does not appreciably solubilize the testosteroneundecanoate in the composition. A hydrophilic surfactant is said to “notappreciably solubilize” testosterone undecanoate when it solubilizes 5wt % or less of the testosterone undecanoate in the composition or thedosage form. In one embodiment, a hydrophilic surfactant is deemed to“not appreciably solubilize” testosterone undecanoate when itsolubilizes 2 wt % or less of the testosterone undecanoate in thecomposition or oral dosage capsule. In all of these embodiments, thepharmaceutical compositions and oral dosage capsules can still becapable of providing the necessary dispersion and pharmacokineticsparameters to effectively treat testosterone deficiency.

The testosterone undecanoate can be present in the pharmaceuticalcompositions and oral dosage capsules in amounts sufficient to comprise14 wt % to about 35 wt % of the composition or capsule fill. In oneembodiment, the testosterone undecanoate can make up about 15 wt % toabout 30 wt % of the composition or oral dosage capsule. In yet afurther embodiment, the oral dosage capsule can comprise about 18 wt %to about 25 wt % of the composition or oral dosage capsule. In still afurther embodiment, the compositions and/or capsule fill material can besuch that the testosterone undecanoate comprises about 14 wt % to about18 wt % of the total composition or capsule fill. In one embodiment, atleast 35 wt % of the testosterone undecanoate in the composition orcapsule fill can be in dissolved form. In yet another embodiment, atleast about 66 wt % of the testosterone undecanoate in the capsule fillor composition can be present in dissolved form. In another embodiment,at least about 5 wt % of the testosterone undecanoate in the capsulefill or composition can be present in undissolved form.

The oral dosage capsules of the present application can include dosagesof testosterone undecanoate of at least 50 mg. The oral dosage capsulesof the present application can include dosages of testosteroneundecanoate of about 80 mg to about 400 mg. In another embodiment, theoral dosage capsule can include about 80 mg to about 140 mg testosteroneundecanoate. In another embodiment, the oral dosage capsule can includeabout 120 mg to about 300 mg testosterone undecanoate. In yet a furtherembodiment, the oral dosage capsule can include about 150 mg to about250 mg of testosterone undecanoate. With this in mind, the compositionsand oral dosage capsule can be used as part of dosing regimens toprovide daily doses of about 250 mg to about 650 mg per day, preferably,daily doses of about 350 mg to about 650 mg per day

The solubilizers used in the pharmaceutical compositions and oral dosagecapsules of the present invention play role in the ability of theformulation to provide the desired therapeutic characteristics.Solubilizers that can be used can be selected from a variety ofcompounds and mixtures of compounds that have the ability to facilitateloading of testosterone undecanoate. The solubilizer can comprise about50 wt % to about 86 wt % of the composition or capsule fill. In oneembodiment, the solubilizer can comprise about 55 wt % to about 82 wt %of the pharmaceutical composition or oral dosage capsule. In anotherembodiment, the solubilizer can comprise about 60 wt % to about 80 wt %of the pharmaceutical composition or oral dosage capsule. In oneembodiment, the solubilizer can be such that the testosteroneundecanoate can have solubility in the solubilizer, at about 37° C., ofabout 250 mg/g to about 750 mg/g (mg testosterone undecanoate/gram ofsolubilizer and testosterone undecanoate).

Non-limiting examples of solubilizers that can be used include C₈ to C₂₂fatty acid glycerides, omega fatty acids, and mixtures thereof. In oneembodiment, the C₈ to C₂₂ fatty acid glycerides can include C₈ to C₂₂medium and/or long chain monoglycerides, medium and/or long chaindiglycerides, or mixtures of a mixture of medium and/or long chainmonoglycerides and medium and/or long chain diglycerides. In anotherembodiment, the solubilizer can consist essentially of medium and/orlong chain monoglycerides and/or diglycerides. Medium to long chainmonoglycerides and diglycerides refers to compounds having chain lengthsof C₈ to C₂₂. In one embodiment, the mixture of monoglycerides anddiglycerides can have chain lengths of C₈ to about C₁₃. In anotherembodiment, the mixture of monoglycerides and diglycerides can havechain lengths of about C₁₄ to about C₂₂. When the solubilizer includesC₈ to C₂₂ fatty acid glycerides, monoglycerides can comprise at leastabout 40 wt % of the C₈ to C₂₂ fatty acid glycerides (such ascommercially available Maisine® 35-1, Capmul® MCM, Peceol,® and thelike). In another embodiment, the monoglycerides can comprise at leastabout 60 wt % of the C₈ to C₂₂ fatty acid glycerides. In yet a furtherembodiment, the monoglycerides can comprise at least about 80 wt % ofthe C₈ to C₂₂ fatty acid glycerides.

Non-limiting examples of C₈ to C₂₂ fatty acid glycerides that can beused as solubilizers in pharmaceutical compositions and oral dosagecapsules of the present invention include monoglycerides and/ordiglycerides derived from sources such as maize oil, poppy seed oil,safflower oil, sunflower oil, borage seed oil, coconut oil, palm kerneloil, castor oil, and mixtures thereof. Although not essential, thesolubilizer can also include a triglyceride. The triglyceride can be amedium and/or long chain triglyceride, or mixture thereof, and can bepresent alone or with other solubilizers. The triglycerides can beselected from a variety of well-known pharmaceutically acceptabletriglycerides including, but not limited to vegetable oils such aspeanut oil, safflower oil, sunflower oil, olive oil, castor oil, cornoil, maize oil, flax seed oil, wheat-germ oil and the like, or theirhydrogenated derivatives and their mixtures thereof. Additionaltriglyceride sources can include animal derived oils such as fish oil,seal oil, whale oil, and the like, triglycerides of C₈-C₂₂ fatty acidsor their mixtures; triglycerides of C₈-C₁₃ fatty acids; triglycerides ofC₁₄-C₂₂ fatty acids. In one embodiment, the composition can include afatty acid triglyceride and the testosterone undecanoate can comprise atleast about 25 wt % of the composition. In another embodiment, thetriglyceride can be castor oil. In yet a further embodiment, the castoroil can comprise about 45 wt % or less of the total composition. In yetanother embodiment, the castor oil can comprise about 40 wt % or less ofthe solubilizer. In a further embodiment, the composition can be free ofcastor oil. In one embodiment of the invention, the solubilizer caninclude a glyceryl palmitostearate, a glyceryl stearate, a glyceryldistearate, glyceryl monostearate, or a combination thereof.

In another aspect of the invention, the solubilizer can include a C₈ toC₂₂ fatty acid glycerides that is monoglycerides and/or diglycerides ofcapric acid, caprylic acid, or mixtures thereof. In another embodiment,the solubilizer can include a C₈ to C₂₂ fatty acid glycerides that is amonoglycerides and/or diglycerides of linoleic acid, oleic acid, ormixtures thereof. Other examples of C₈ to C₂₂ fatty acids that can beused include capric acid, pelargonic acid, caprylic acid, undecanoicacid, lauric acid, myristic acid, palmitic acid, stearic acid, oleicacid, linoleic acid, linolenic acid, arachodonic acid, eicosapentaenoicacid, docosahexanoic acid, and mixtures thereof. In one embodiment, theC₈ to C₂₂ fatty acid can be capric acid, caprylic acid, undecanoic acid,lauric acid, myristic acid, palmitic acid, stearic acid, oleic acid,linoleic acid, linolenic acid or mixtures thereof. In anotherembodiment, the C₈ to C₂₂ fatty acid can be selected from the groupconsisting of capric acid, caprylic acid, oleic acid, linoleic acid, andmixtures thereof. In one embodiment, the composition or capsule fill canbe free of ionizable fatty acids. In another embodiment, the compositionor capsule fill can be free of oleic acid.

In a further embodiment, the solubilizer can include an alcohol.Non-limiting examples of alcohols that can be used as solubilizersinclude tocopherol, ethyl alcohol, isopropanol, butanol, benzyl alcohol,ethylene glycol, propylene glycol, butanediol, glycerol,pentaerythritol, transcutol, dimethyl isosorbide, polyethylene glycoland mixtures thereof. In one embodiment, the solubilizer can be ethylalcohol, benzyl alcohol, tocopherol, and mixtures thereof.

The pharmaceutical compositions and oral dosage capsules can alsoinclude a dispersant. In one aspect of the invention, the dispersant canbe a hydrophilic surfactant having an HLB value of greater than 10, alipophilic surfactant having an HLB value of 10 or less, or combinationsthereof. In one embodiment, the compositions and oral dosage forms caninclude at least one hydrophilic surfactant. In another embodiment thecapsule fill includes at least one hydrophilic surfactant and at leastone lipophilic surfactant.

Unlike dosage forms containing ionizable components such as fatty acids(e.g. oleic acid), which are prone to being ionized at higher pH valuesthereby becoming charged and serving as a hydrophilic surfactant, it hasbeen found that for improved bioavailability or activity of TU fortestosterone therapy it can be useful for a composition's performance tobe robust with regards to inter-conversion between hydrophilic andhydrophobic species as determined by the absence of ionized ionizablefatty acid due to pH changes such as encountered in thegastro-intestinal tract.

The total amount of lipophilic component is the total amount in wt % ofthe lipophilic components including the mono-, di- and/or tri-glyceridesand the lipophilic surfactants, if present in the composition. In oneembodiment, the lipophilic surfactant includes the solubilizer and thelipophilic surfactant. The total amount of hydrophilic surfactant is thetotal amount (in wt %) of the added hydrophilic surfactant and thathydrophilic surfactant formed in situ in an aqueous medium as a functionof pH (e.g. intestinal pH) due to the hydrophilic ionized ionizablefatty acid (e.g. oleate) formed from lipophilic unionized ionizablefatty acid (oleic acid).

Therefore, even though fatty acid such as oleic acid may be a goodsolubilizer for testosterone undecanoate, its bioavailability andactivity is substantially compromised with fatty acid containingcompositions either by being unable to continue to solubilize the drug,or be inadequate facilitator for chylomicron related testosteroneundecanoate absorption or can be slow to allow drug to partitioning outof the carrier.

When present, the hydrophilic surfactant can, but does not have to haveappreciable solubilizing effect for the testosterone undecanoate presentin the composition. Non-limiting examples of hydrophilic surfactantsthat can be included are non-ionic hydrophilic surfactants such aspolysorbates, polyoxyethylene hydrogenated vegetable oils,polyoxyethylene vegetable oils; polyoxyethylene sorbitan fatty acidesters; polyoxyethylene-polyoxypropylene block copolymers; polyglycerolfatty acid esters; polyoxyethylene glycerides; polyoxyethylene sterols,derivatives and analogues thereof reaction mixtures of polyols and atleast one member of the group consisting of fatty acids, glycerides,vegetable oils, hydrogenated vegetable oils, fractionated oils andsterols; tocopheryl polyethylene glycol succinates; sugar esters; sugarethers; sucroglycerides; mixtures thereof; alkylglucosides;alkylmaltosides; alkylthioglucosides; lauryl macrogolglycerides;polyoxyethylene alkyl ethers; polyoxyethylene alkylphenols; polyethyleneglycol fatty acids esters; polyethylene glycol glycerol fatty acidesters; polyoxyethylene sorbitan fatty acid esters;polyoxyethylene-polyoxypropylene block copolymers such as poloxamer-108,188, 217, 238, 288, 338, 407, 124, 182, 183, 212, 331, or 335, orcombinations thereof; ionic hydrophilic surfactants such as sodiumdodecyl sulphate, docusate sodium; bile acid, cholic acid, deoxycholicacid, chenodeoxycholic acid, salts thereof, and mixtures thereof. In oneembodiment, the pharmaceutical composition or oral dosage form can besubstantially free of hydrophilic surfactants.

In one embodiment, the hydrophilic surfactant can have at least onecharacteristic of: 1) being present in an amount such that it does notappreciably solubilize testosterone undecanoate present in thecomposition; or 2) the solubility of testosterone undecanoate in thehydrophilic surfactant at about 25° C., is less than 100 mg/gram orless, based on the total weight of the testosterone undecanoate and thesolubilizer.

In one embodiment, the hydrophilic surfactant can have at least onecharacteristic of: 1) being present in an amount such that itsolubilizes less than 5 wt % of the testosterone undecanoate present inthe composition; or 2) the solubility of testosterone undecanoate in thehydrophilic surfactant at about 25° C., is less than 100 mg/gram orless, based on the total weight of the testosterone undecanoate and thesurfactant. In another embodiment, the hydrophilic surfactant can haveat least one characteristic of: 1) the hydrophilic surfactant is presentin an amount such that it solubilizes less than 5 wt % of thetestosterone undecanoate present in the composition; or 2) thesolubility of testosterone undecanoate in the hydrophilic surfactant atabout 25° C., is about 50 mg/gram or less, based on the total weight ofthe testosterone undecanoate and the surfactant. In yet a furtherembodiment, the hydrophilic surfactant can have a least onecharacteristic of: 1) the hydrophilic surfactant is present in an amountsuch that it solubilizes less than 5 wt % of the testosteroneundecanoate present in the composition; or 2) the solubility oftestosterone undecanoate in the hydrophilic surfactant at about 25° C.about 10 mg/gram or less, based on the total weight of the testosteroneundecanoate and the surfactant. In yet a further embodiment, thehydrophilic surfactant can have the characteristic of: 1) thehydrophilic surfactant is present in an amount such that it solubilizesless than 5 wt % of the testosterone undecanoate present in thecomposition; and 2) the solubility of testosterone undecanoate in thehydrophilic surfactant at about 25° C., is about 50 mg/gram or less,based on the total weight of the testosterone undecanoate and thesurfactant.

As discussed above, in some embodiments the compositions and oral dosagecapsules can include at least one lipophilic surfactant. Variouslipophilic surfactants can be used including, but not limited toreaction mixtures of alcohols or polyalcohols with a variety of naturaland/or hydrogenated oils such as PEG-5 hydrogenated castor oil, PEG-7hydrogenated castor oil, PEG-9 hydrogenated castor oil, PEG-6 corn oil(Labrafil® M 2125 CS), PEG-6 almond oil (Labrafil® M 1966 CS), PEG-6apricot kernel oil (Labrafil® M 1944 CS), PEG-6 olive oil (Labrafil® M1980 CS), PEG-6 peanut oil (Labrafil® M 1969 CS), PEG-6 hydrogenatedpalm kernel oil (Labrafil® M 2130 BS), PEG-6 palm kernel oil (Labrafil®M 2130 CS), PEG-6 triolein (Labrafil® M 2735 CS), PEG-8 corn oil(Labrafil® WL 2609 BS), PEG-20 corn glycerides (Crovol® M40), PEG-20almond glycerides (Crovol® A40), lipophilicpolyoxyethylene-polyoxypropylene block co-polymers (Pluronic® L92, L101,L121 etc.); propylene glycol fatty acid esters, such as propylene glycolmonolaurate (Lauroglycol FCC), propylene glycol ricinoleate (Propymuls),propylene glycol monooleate (Myverol P-O6), propylene glycoldicaprylate/dicaprate (Captex® 200), and propylene glycol dioctanoate(Captex® 800), propylene glycol mono-caprylate (Capryol® 90); propyleneglycol oleate (Lutrol OP2000); propylene glycol myristate; propyleneglycol mono stearate; propylene glycol hydroxy stearate; propyleneglycol ricinoleate; propylene glycol isostearate; propylene glycolmono-oleate; propylene glycol dicaprylate/dicaprate; propylene glycoldioctanoate; propylene glycol caprylate-caprate; propylene glycoldilaurate; propylene glycol distearate; propylene glycol dicaprylate;propylene glycol dicaprate; mixtures of propylene glycol esters andglycerol esters such as mixtures composed of the oleic acid esters ofpropylene glycol and glycerol (Arlacel® 186); sterol and sterolderivatives such as cholesterol, sitosterol, phytosterol, PEG-5 soyasterol, PEG-10 soya sterol, PEG-20 soya sterol, and the like; glycerylpalmitostearate, glyceryl stearate, glyceryl distearate, glycerylmonostearate, or a combination thereof; sorbitan fatty acid esters suchas sorbitan monolaurate (Arlacel 20), sorbitan monopalmitate (Span-40),sorbitan monooleate (Span-80), sorbitan monostearate, and sorbitantristearate, sorbitan monolaurate, sorbitan monopalmitate, sorbitanmonooleate, sorbitan trioleate, sorbitan sesquioleate, sorbitantristearate, sorbitan monoisostearate, sorbitan sesquistearate, and thelike; and mixtures thereof. It is important to note that some lipophilicsurfactants may also function as the solubilizer component of thecompositions and oral dosage forms.

In one embodiment, the lipophilic surfactant can be selected from thegroup consisting of propylene glycol mono caprylate, propylene glycololeate, propylene glycol monostearate, propylene glycol monolaurate,propylene glycol mono-oleate, propylene glycol dicaprylate/dicaprate,sorbitan monooleate, PEG-5 hydrogenated castor oil, PEG-7 hydrogenatedcastor oil, PEG-9 hydrogenated castor oil, PEG-6 corn oil, PEG-6 almondoil, PEG-6 apricot kernel oil, PEG-6 olive oil, PEG-6 peanut oil, PEG-6hydrogenated palm kernel oil, sorbitan monolaurate (Arlacel 20),sorbitan monopalmitate, sorbitan monooleate, sorbitan monostearate,sorbitan tristearate, sorbitan monolaurate, sorbitan monopalmitate,sorbitan monooleate, sorbitan trioleate, sorbitan sesquioleate, sorbitantristearate, sorbitan monoisostearate, and combinations thereof.

In another aspect of the invention, the pharmaceutical compositionsand/or oral dosage capsules, namely the capsule fill, can include asolidifying agent. As defined above, a solidifying agent is apharmaceutically acceptable additive that is in a solid physical stateat 20° C. Typically solidifying agents facilitate the solidification ofthe pharmaceutical compositions of the present invention at temperaturesaround room temperature. The compositions and capsule fill of thepresent invention, including those with solidifying agents, can benon-liquid at standard temperature and pressure. In one embodiment, thecomposition and capsule fill can be semi-solid at standard temperatureand pressure. In yet another embodiment, the composition and capsulefill can be solid at standard temperature and pressure. When present,the solidifying agent can comprise from about 0.1 wt % to about 25 wt %of the pharmaceutical composition or oral dosage capsule. In anotherembodiment, the solidifying agent can comprise about 2 wt % to about 20wt % of the composition or oral dosage capsule. In yet a furtherembodiment, the solidifying agent can comprise about 3 wt % to about 15wt % of the composition or oral dosage capsule. In still a furtherembodiment, the solidifying agent can comprise about 3 wt % to about 9wt % of the capsule fill. In yet a further embodiment, the solidifyingagent can comprise 6 wt % to 9 wt % of the capsule fill. In oneembodiment, the solidifying agent can melt at a temperature of about 45°C. to about 75° C. Non-limiting examples of solidifying agents that canbe used include polyethylene glycols; sorbitol; gelatin; stearic acid;cetyl alcohol; cetosterayl alcohol; paraffin wax; polyvinyl alcohol;glyceryl stearates; glyceryl distearate; glyceryl monostearate; glycerylpalmitostearate; glyceryl behenate; waxes; hydrogenated castor oil;hydrogenated vegetable oil; bees wax, microcrystalline wax; sterols;phytosterols; cholesterol and mixtures thereof. In one embodiment, thesolidifying agent includes a polyethylene glycol (PEG) having molecularweight from about 1000 to about 20,000 and their mixtures. In anotherembodiment the solidifying agent includes one or more selected from thegroup consisting of polyethylene glycol; gelatin; stearic acid;polyvinyl alcohol; glyceryl stearates; glyceryl distearate; glycerylmonostearate; glyceryl palmitostearate; hydrogenated castor oil;hydrogenated vegetable oil and cholesterol. In one embodiment, thepharmaceutical composition can be a solid at about 20° C. In yet afurther embodiment, the solubilized solid and/or the undissolvedcrystalline testosterone undecanoate can act as a solidifying agent.

The oral compositions of the present invention can be formulated to takeany dosage form commonly known in the pharmaceutical arts such asgranules, tablet or capsule. In one embodiment, the oral dosage form canbe a capsule having a pharmaceutical composition of the presentinvention disposed therein. Both soft and hard gelatin and non-gelatincapsules can be used. The capsule size can be any size known in the artand can vary depending on the desired dosage amount. In one embodiment,the capsule can be a hard gelatin capsule having a fill volume of about0.3 mL to about 1.1 mL. The oral dosage capsules can be immediaterelease, extended release, targeted release, enteric release, delayedrelease dosage form or combinations thereof. In a specific embodiment,the oral dosage capsule can be a delayed release dosage form. In oneembodiment, the capsule can have a ratio of the amount of testosteroneundecanoate to the volume of the capsule fill can be about 80 mg/mL toabout 750 g/mL. In another embodiment, the capsule can have a ratio ofthe amount of testosterone undecanoate to the volume of the capsule fillcan be about 160 mg/mL to about 375 mg/mL.

The oral dosage capsules of the present invention can be formulated suchthat they have distinctive release profiles. In one embodiment, an oraldosage capsule can provide in vitro release of at least about 75 wt % ofthe testosterone undecanoate during the first 120 minutes when testedusing about 1000 mL of 8% w/v Triton X-100 in water maintained at about37±1° C. taken in a USP-Type II dissolution apparatus set at 100 rpm. Inanother embodiment, the oral dosage capsule can have an in vitro releaseprofile such that 85 wt % or less of the testosterone undecanoate isreleased in the first 30 minutes, when measured using about 1000 mL of8% w/v Triton X-100 in water maintained at about 37±1° C. taken in aUSP-Type II dissolution apparatus set at 100 rpm. In further embodiment,the oral dosage capsule can have an in vitro release profile such that70 wt % or less of the testosterone undecanoate is released in the first30 minutes, when measured using about 1000 mL of 8% w/v Triton X-100 inwater maintained at about 37±1° C. taken in a USP-Type II dissolutionapparatus set at 100 rpm. In an additional embodiment, the oral dosagecapsule can have a in vitro release profile such that at least 35 wt %of the testosterone undecanoate is released in the first 30 minutes,when measured using about 1000 mL of 8% w/v Triton X-100 in watermaintained at about 37±1° C. taken in a USP-Type II dissolutionapparatus set at 100 rpm. In still an additional embodiment, the oraldosage capsule can have an in vitro release profile such that at least40 wt % of the testosterone undecanoate is released in the first 30minutes, when measured using about 1000 mL of 8% w/v Triton X-100 inwater maintained at about 37±1° C. taken in a USP-Type II dissolutionapparatus set at 100 rpm.

In one aspect, the dosage form can comprise two or more of populationsof testosterone undecanoate compositions of the present invention. Inone embodiment, at least one of the populations can be formulated tostart releasing testosterone undecanoate immediately into a surroundingaqueous medium. In another embodiment, at least one the populations canbe formulated to start releasing testosterone undecanoate after at least2 hours. In another embodiment, at least one the populations can beformulated to release testosterone undecanoate after about 4 hours, orafter about 6 hours, or after about 8 hours, or after about 10 hours.

In yet a further embodiment, at least one of the populations can beformulated to start releasing testosterone undecanoate immediately afteroral administration to a human. In one particular case, at least one ofthe populations can be formulated to start releasing testosteroneundecanoate in the duodenal region after oral administration to a human.In another particular case, at least one of the populations can beformulated to start releasing testosterone undecanoate in the smallintestine after oral administration to a human.

In yet a further embodiment, at least one of the populations includes apH sensitive substance. In a particular case, at least one of thepopulations can be formulated to start releasing testosteroneundecanoate at a pH of from about 1.0 to about 3.4. In anotherparticular case, at least one of the populations can be formulated tostart releasing testosterone undecanoate at a pH of from about 3.5 toabout 5.5. In another particular case, at least one of the populationscan be formulated to start releasing testosterone undecanoate at a pH offrom about 5.6 to about 6.8. In another particular case, at least one ofthe populations can be formulated to start releasing testosteroneundecanoate at a pH about 7.0 or more.

In yet another aspect, the dosage form comprising two or more ofpopulations of testosterone undecanoate compositions of the presentinvention is a capsule. In a particular case, the dosage form is acapsule in capsule dosage form. In another particular case the dosageform is a tablet in capsule dosage form. In another particular case, thedosage form is a granules or pellets or tablets or minitablets disposedin a capsule.

The oral dosage capsules of the present invention can be formulated suchthat, when administered to a human male they provide a serum totaltestosterone C_(avg) ranging about 300 ng/dL to about 1100 ng/dL. Inanother embodiment, the oral dosage capsules can be formulated suchthat, upon single administration to a human male, they provide a serumtotal testosterone C_(avg) ranging about 350 ng/dL to about 800 ng/dL.In another embodiment, the oral dosage capsules can be formulated suchthat, upon single administration to a human male, they provide a serumtotal testosterone C_(avg) ranging from about 400 ng/dL to about 600ng/dL. It is noted that such C_(avg) value can be achieved based onadministration every 12 hours or every 8 hours. Similarly, the oraldosage capsules can be formulated such that, upon single administrationto a human male, they provide a serum testosterone undecanoate C_(avg)of about 1.5 ng/mL to about 1 mcg/mL. In a further embodiment, the oraldosage capsules can be formulated such that, upon single administrationto a human male, they provide a serum testosterone undecanoate C_(avg)of about 3 ng/mL to about 850 ng/mL. In a further embodiment, the oraldosage capsules can be formulated such that, upon single administrationto a human male, they provide a serum testosterone undecanoate C_(avg)of about 10 ng/mL to about 850 ng/mL. In one embodiment, upon a singledose administration of the capsule to a subject the capsule provides adose-normalized serum testosterone C_(max) of about 3×10⁻⁶ dL⁻¹ orhigher. In another embodiment, upon a single dose administration of thecapsule to a subject the capsule provides a dose-normalized serumtestosterone C_(avg) of about 1.9×10⁻⁶ dL⁻¹ or higher. In yet anotherembodiment, upon a single dose administration of the capsule to asubject the capsule provides a dose-normalized serum testosteroneC_(avg) of about 2.7×10⁻⁶ dL⁻¹ or higher.

In another aspect, the oral dosage capsules can be formulated such thatupon single administration d to a male human subject they provide aratio of serum testosterone undecanoate C_(avg) to serum totaltestosterone C_(avg) of about 4:1 to about 75:1. In a furtherembodiment, the oral dosage capsules can be formulated such that, uponsingle administration to a human male, they provide a ratio of serumtestosterone undecanoate C_(avg) to serum total testosterone C_(avg) ofabout 20:1 to about 50:1. In yet another embodiment, the oral dosagecapsules can be formulated such that, upon single administration to ahuman male, the oral dosage capsule provides a ratio of serum totaltestosterone C_(avg) to dose of testosterone undecanoate of about0.2×10⁻⁶ dL⁻¹ to about 20×10⁻⁶ dL⁻¹.

In one embodiment, a single dose of the testosterone undecanoatecomposition or oral dosage form can provide a serum total testosteroneC_(avg) of about 300 ng/dL or more from about 0.5 hours to about 24hours after oral administration with a meal or a snack. In a furtherembodiment, a single dose of a testosterone undecanoate composition ororal dosage capsule can provide a serum total testosterone C_(avg) ofabout 300 ng/dL or more at about 20 hours after oral administration witha meal or a snack. In yet a further embodiment, a single dose of thetestosterone undecanoate composition can provide a serum totaltestosterone C_(avg) of about 300 ng/dL or more at about 18 hours afteroral administration with a meal or a snack. In still a furtherembodiment, a single dose of the testosterone undecanoate compositioncan provide a serum total testosterone C_(avg) of about 300 ng/dL ormore at about 16 hours after oral administration with a meal snack. Instill a further embodiment, a single dose of the testosteroneundecanoate composition can provide a serum total testosterone C_(avg)of about 300 ng/dL or more at about 12 hours after administration afteroral administration with a meal snack. In still a further embodiment, asingle dose of the testosterone undecanoate composition can provide aserum total testosterone C_(avg) of about 300 ng/dL or more at about 8hours after oral administration with a meal or snack. The meal that isadministered with the composition or oral dosage form can be a standardmeal or a snack.

The compositions and oral dosage capsules disclosed herein can be, butdo not have to be, orally administered with food. In one embodiment, thecomposition or oral dosage capsule can be administered with a meal, suchas a meal that provides about 200 to about 1000 calories of energy. Inanother embodiment, the composition or oral dosage capsule can beadministered with a standard meal. In another embodiment, thecomposition or oral dosage capsule can be administered with a meal thatprovides about 50% of the calories derived from the fat. In anotherembodiment, the composition or oral dosage capsule can be administeredwith a high-fat, high calorie meal. In another embodiment, thecomposition or oral dosage capsule can be administered with a meal thatprovides about 500 to about 1000 calories of energy. In anotherembodiment, the composition or oral dosage capsule can be administeredwith a meal that provides about 400 to about 700 calories derived fromthe fat therein. The compositional make-up of the meals that areadministered can vary depending on the tastes and dietary needs of asubject. However, in some situations it may be beneficial to administerthe compositions and oral dosage forms with meals that provide no fat orup to about 50 g of fat. In one embodiment, the meal can provide about10 g to about 50 g of fat. In yet a further embodiment, the meal canprovide about 30 g of fat. The testosterone undecanoate dosagecompositions and oral dosage capsules disclosed herein can be orallyadministered in a 24 hours' dosing regimen (also referred to as or adaily dosing regimen) that is suitable to the needs of the subject. The24 hours' dosing regimen can include administering the dosage formsafter meals in the morning, at about noon, in the evening, at aboutnight time or combinations thereof. The 24 hours' dosing regimen caninclude dosing one or more dosage units at one or more administrationtimes. In one embodiment, the pharmaceutical composition is administeredas a single oral dosage capsule.

The testosterone undecanoate compositions and oral dosage capsules canprovide increased bioavailability as compared to other testosteroneundecanoate compositions and dosage forms. In some embodiments, thetestosterone undecanoate oral dosage capsules can provide an in vitrorelease of less than about 85 wt % of the testosterone undecanoatewithin the first 30 minutes. In another embodiment, the testosteroneundecanoate oral dosage capsules can provide an in vitro release ofabout 90 wt % or less testosterone undecanoate within the first 30minutes. The in vitro release is determined in about 1000 mL of 8% w/vTriton X-100 in water maintained at about 37° C. in an USPType-2Apparatus at about 100 rpm. It has been discovered that thesetestosterone undecanoate oral dosage capsules, i.e. those having theabove release characteristics, provide at least a 10% increase in thetestosterone undecanoate AUC after single oral dosages are administeredto human males. The increase is as compared to equivalent dosages oftestosterone undecanoate in an immediate release dosage formsadministered under same conditions. Immediate release dosage forms aredefined as being dosage forms which release more than 95 wt % of thetestosterone undecanoate within the first 30 minutes using the same invitro release conditions described above. Further, in one embodiment,the testosterone undecanoate oral dosage capsules can provide at least a15% increase in the testosterone undecanoate AUC as compared to animmediate release dosage oral dosage form.

In another embodiment, the testosterone undecanoate oral dosage capsulesdisclosed herein can provide at least a 10% reduction in theinter-subject variability of the testosterone undecanoate C_(max),and/or the testosterone undecanoate AUC as compared to immediate releaseequivalent dosage containing oral dosage forms. In another embodiment,the testosterone undecanoate oral dosage capsules disclosed herein canprovide 10% or more testosterone bioavailability in subjects as comparedto immediate release equivalent dosed oral dosage forms.

The pharmaceutical compositions and oral dosage capsules of the presentinvention can be formulated such that upon administration of one or morecapsules daily to each subject in a group of at least 24 hypogonadalmales for a period of at least 84 days, the capsule provides a serumtestosterone C_(avg) of 300 ng/dL to 1100 ng/dL in at least 75% of thehypogonadal males in the group. Additionally, under such anadministration regimen the capsule can be such that at least one of thefollowing regarding the PK parameter of the administration is true: a) aserum testosterone C_(max) of less than 1500 ng/dL in at least 85% ofthe hypogonadal males in the group; b) a serum testosterone C_(max) ofabout 1800 ng/dL to about 2500 ng/dL in 5% or less of the hypogonadalmales in the group; or c) a serum testosterone C_(max) greater than 2500ng/dL in about 1% or less of the hypogonadal males in the group.

In one embodiment, the administration over the at least 84 days can bedivided into two dosing regimens including an initial regimen in whichan initial dose is administered and a maintenance regimen in which amaintenance dose is administered. In one aspect of this embodiment, thedaily dose of the maintenance regimen of the testosterone undecanoatecan be about 45% to about 155% of the initial daily dose. In anotheraspect of the embodiment, the daily dose of the maintenance regimen ofthe testosterone undecanoate can be about 66% to about 133% of theinitial daily dose. In another aspect of the embodiment, the daily doseof the maintenance regimen of the testosterone undecanoate can be about75% to about 125% of the initial daily dose. In yet a further aspect ofthis embodiment, the capsule can be formulated such that the amount ofthe daily dose of the maintenance regimen is based on at least onetestosterone undecanoate dose titration metric derived from themeasurement of the serum testosterone concentration on at least onetitration node day. The titration node day can be any single daybeginning on day 15 to day 84 after administration of the initial dailydose. In one embodiment, the titration node day can be any day from day15 to day 21 after administration the daily dose of the initial regimenof the initial regimen. In yet another embodiment, the titration nodeday is any day from day 22 to day 30 after administration of the dailydose of the initial regimen of the initial regimen. In furtherembodiments, the titration node day can be any day from day 22 to day30, from day 31 to day 63, or from day 64 to day 84 after administrationof the daily dose of the initial regimen of the initial regimen.

In one aspect, the titration based on the titration metric can be suchthat if the testing of the metric is serum testosterone concentrationand the testing is done at time (t) of 1 to less than 3 hours followingadministration the serum testosterone concentration is less than 12.0ng/mL then the daily TU dose may need to be increased and if the serumtestosterone concentration is more than 9.4 then the daily TU dose mayneed to be decreased. In another aspect, the titration metric is serumtestosterone concentration and the testing is done at time (t) ii) if attime (t) of 3 to less than 8 hours following administration the serumtestosterone concentration is less than 4.1 ng/mL daily TU dose may needto be increased and if the serum testosterone concentration is more than18.1 then the daily TU dose may need to be decreased. In another aspect,the titration metric is serum testosterone concentration and the testingis done at time (t) of 8 to less than 12 hours following administrationthe serum testosterone concentration is less than 3.0 ng/mL then thedaily TU dose may need to be increased and if the serum testosteroneconcentration is more than 7.8 then the daily TU dose may need to bedecreased. In yet a further aspect, the titration metric is serumtestosterone concentration and the testing is done at time (t) of 12 toless than 14 hours following administration the serum testosteroneconcentration is less than 1.4 ng/mL then the daily TU dose may need tobe increased and if the serum testosterone concentration is more than2.9, then the daily TU dose may need to be decreased. The abovetitrations are only exemplary of the possible titrations that can beaccomplished using the methods of the present invention. It is furthernoteworthy that the titrations can be used in conjunction with themethods taught herein including the disclosed methods of providing aserum concentration of testosterone within a target serum testosteroneC_(ave) range for a male subject.

The testosterone undecanoate compositions and oral dosage capsulesdisclosed herein can be used in conjunction with or as a component of adiagnostic or treatment kit that enables the diagnosis and treatment ofa male patient in need of testosterone therapy. The diagnostic ortreatment kit may comprise the testosterone undecanoate composition ororal dosage capsule disclosed herein along with one or more othercomponents, including, but not limited to 1) instructions to enablethose ordinarily skilled in the art to prepare a dosage form forimmediate dispensing to the subject in need of; 2) one or morecontainers filled with one or more of the ingredients of the oralpharmaceutical dosage forms of the invention. Suitable containersinclude, for example, a bottle, a box, a blister card, a foil packet, ora combination thereof; 3) a tamper proof container or packaging; 4)other pharmaceutical dosage forms including other active agentsincluding PDE-5 inhibitors and glucocorticosteroids; 5) Notice orprinted instructions: in a form prescribed by a governmental agencyregulating the manufacture, use, or sale of pharmaceuticals orbiological products, which notice reflects approval by the agency of themanufacture, use, or sale for human administration to treat a conditionthat could be treated by oral testosterone therapy; 6) A “planner” formonitoring and tracking administration of the oral dosage forms; 7)Containers for storing and transporting the components of the kit; 8)total testosterone or free testosterone testing kits; 9) Sex Hormonebinding globulin, SHBG, testing kits; 10) Body mass index testingmaterials to identify high risk patients; 11) tests for identifyingpatients with hypogonadism; 12) tests to assess testicular function orimpotency; 13) test for bone mineral density/osteoporosis; 14) test forhair density 15) test for muscle mass and strength; 16) test fordetermining erectile dysfunction; 17) test for decreased libido; 18)test for fatigue, depression, mood disorders or irritability; 19) testfor infertility; 20) test for prostate condition.

The oral dosage compositions and oral dosage capsules disclosed hereincan be co-administered with other active agents in order to treat atarget condition. One or more co-administered active agents can beadmixed with the testosterone undecanoate containing compositions and/ororal dosage forms of the current invention. For example,phosphodiesterase type 5 (PDE-5) inhibitors, such as sildenafil citrate,tadalafil, vardenafil, avanafil, lodenafil, mirodenafil, udenafil, andthe like, are used to block the degradative action of phosphodiesterasetype 5 enzyme on cyclic GMP in the smooth muscle cells lining the bloodvessels supplying the corpus cavernosum of the penis and are frequentlyused to treat erectile dysfunction. Such compounds could beco-administered with the compositions and oral dosage forms of thepresent invention in order to provide improved clinical outcomes throughsynergistic pharmacological action as measured by improved (sooner,better and longer lasting) erection, potency, libido, mood, body mass,etc. in males relative to administration of the testosterone or theco-administered PDE-5 alone. The testosterone undecanoate compositionsand oral dosage capsules can also be co-administered with one or moreother active agents such as aromatase inhibitors (for example letrozole,anastrozole, exemestane, fadrozole, vorozole, formestane etc.), dopamineagonists (for example apomorphine, bromocriptine, cabergoline,pergolide, ropinirole, rotigotine, pramipexole, fenoldopam etc.),prostaglandins (for example alprostadil), alpha blockers (for exampleyohimbine, phentolamine), vasodilators (for example minoxidil) and thelike, for improved clinical outcomes through synergistic pharmacologicalaction as measured by improvements in one or more of the secondarysexual characteristics in males such as sexual activity, potency,libido, erection etc., mood, body mass and the like, relative toadministration of either the testosterone or the co-administered activeagent alone.

In another aspect, the subjects receiving the dosage form of thisinvention are expected to improve in quality of life. The patientreported outcome may be employed to measure the improvement in otherlevels apart from primary (serum testosterone C_(ave)) and secondary(serum testosterone C_(max), C_(min), C_(trough), etc) outcomes whichare typically quantified by the PK profiles. For measuring thepharmacodynamic related efficacy outcomes, the improvements in thesymptoms are usually monitored by ranking or scoring, dairy recordingetc, by the subject being treated and/or the partner or spouse of thesubject, in a timely manner before and during the therapy.

Accordingly, in one embodiment the dosage forms and the methods ofcurrent invention improve sexual symptoms including but not limited tosexual activity engagement, sexual thoughts or fantasies; feel of sexualdesire; frequency of experience of morning erections; maintainingerections as long as desired; hardness of erection; ejaculation;enjoyment/satisfaction of sexual activity. In another embodiment thedosage form and the methods of current invention improves or enhancesthe physical and physiological symptoms and body energy level asassessed by the level of happiness with the body looks; body musclemass, body weight and weakness/strength of muscles; level of tiredness;level of physical tiredness; level of energy; level of exhaustion andthe like.

In another embodiment the dosage form and the methods of the currentinvention improves the symptoms related to the sleep symptoms andmemory/cognition as assessed by quality of sleep at night; frequency ofsleep restfulness; number of wake-up times during the night; frequencyof feeling of satisfactory rest, frequency of accidental doze off duringthe day; frequency of purposely taken naps during the day; focusattention to tasks; level of forgetfulness; desire or ambition to takeon new projects; short attention span; successful/efficient completionof tasks.

In a further aspect, the compositions of the current invention can beformulated to provide a gastro-retentive dosage form. In one embodiment,the gastro-retentive dosage form is a capsule. In another embodiment,the gastro-retentive dosage form is retained in the uppergastro-intestinal tract for at least one hour post-dosing. In anotherembodiment, the gastro-retentive dosage form is retained in the uppergastro-intestinal tract for at least two hours post-dosing. In anotherembodiment, the gastro-retentive dosage form is retained in the uppergastro-intestinal tract for at least 4 hours post-dosing. In anotherembodiment, the gastro-retentive dosage form is formulated to float inthe stomach after dosing. In another embodiment, the gastro-retentivedosage form is formulated to expand when it comes in contact withaqueous medium to at least 1.3 times its size compared to its size whenit is not in contact with the aqueous use environment. In anotherembodiment, the gastro-retentive dosage form is formulated to adhere tothe lining of the stomach wall after dosing.

The compositions and the oral dosage capsules of the current inventioncan also include one or more of other additives selected from binders,bufferants, diluents, disintegrants, flavors, colorants, taste-maskingagents, resins, pH modifiers, lubricants, glidants, thickening agent,opacifying agent, humectants, desiccants, effervescing agents,plasticizing agents and the like.

In addition to the compositions and oral dosage capsules of the presentinvention, a method for providing a serum concentration of testosteronewithin a target serum testosterone concentration C_(ave) range for amale subject is also provided. It is noted that the compositions andoral dosage capsules of the present invention can be used in theconjunction with this method and that the teachings regarding thecompositions and their administration provided above can be applied andused in connection with the methods disclosed here. The method includesthe step of orally administering to the male subject an initial regimenincluding a daily dose of a testosterone undecanoate-containingcomposition. The testosterone undecanoate comprises about 14 wt % toabout 35 wt % of the testosterone undecanoate-containing composition andthe daily dose provides about 350 mg to about 650 mg of testosteroneundecanoate to the male subject. After the initial regimen, the methodincludes a step of determining a dose titration metric based on ameasurement of serum testosterone concentration for the male subject onat least one titration node day within the initial regimen. The methodfurther includes the step of orally administering to the male subject amaintenance regimen including a daily dose of testosteroneundecanoate-containing composition that comprises about 14 wt % to about35 wt % of the testosterone undecanoate. The maintenance regimenprovides a daily dose of testosterone undecanoate to the subject basedon the titration metric determined on the at least one titration nodeday of the initial regimen and is sufficient to provide a serumtestosterone plasma concentration that is closer to or within the targetrange.

In one embodiment, the method for providing a serum concentration oftestosterone within a target serum testosterone concentration C_(ave)range for a male subject can further include the steps of determining adose titration metric based on a measurement of serum testosteroneconcentration for the male subject on at least one titration node daywithin the maintenance regimen. Following the determination of thetitration metric the method includes the step of orally administering tothe male subject a second maintenance regimen including a daily dose oftestosterone undecanoate-containing composition, wherein thetestosterone undecanoate-containing composition comprises about 14 wt %to about 35 wt % of the testosterone undecanoate-containing composition.The second maintenance regimen provides a daily dose of testosteroneundecanoate to the subject based on the titration metric determined onthe at least one titration node day of the maintenance regimensufficient to provide a serum testosterone plasma concentration withinthe target range. Following the second maintenance regimen, the steps ofdetermining the titration metric and administering an additionalmaintenance regimen can be repeated as needed in order to achieve the aserum testosterone concentration within the target range.

In the above method, the daily dose administered in the initial regimencan be the same dosage amount as the daily dose administered in themaintenance regimen. In one embodiment, the daily dose of themaintenance regimen can provide an amount of testosterone undecanoatethat is about 45% to about 155% of that of the initial daily dose. Inanother embodiment, the daily dose of the maintenance regimen canprovide an amount of testosterone undecanoate that is about 66% to about133% of that of the daily dose in the initial regimen. In yet anotherembodiment, the daily dose of the maintenance regimen can provide anamount of testosterone undecanoate that is about 75% to about 125% ofthat of the daily dose in the initial regimen.

The determination step or steps of the above described methods can beany single day from day after day 15 of the initial regimen. In oneembodiment, the titration node day can be any single day from day 15 today 21 following the start of the initial regimen. In anotherembodiment, the titration node day can be any single day from day 21 today 30 following the start of the initial regimen. In yet a furtherembodiment, the titration node day is any single day from day 31 to day63 following the start of the initial regimen. In still a furtherembodiment, the titration node day can be any single day from day 64 today 84 following the start of the initial regimen.

As discussed previously, subjects with whom the methods of the presentinvention can be used can be those in need of testosterone therapy. Inone aspect, the male subject with whom the method is being used can havea serum testosterone C_(avg) of less than 300 ng/dL before beginning ofthe initial regimen. In another aspect, the male subject can have aserum testosterone C_(avg) of less than 200 ng/dL before beginning ofthe initial regimen. In yet another aspect, the male subject can have aserum testosterone C_(avg) of less than 300 ng/dL before beginning ofthe maintenance regimen. In yet a further aspect, the male subject canhave a serum testosterone C_(avg) of less than 200 ng/dL beforebeginning of the maintenance regimen. Similarly, the target serumtestosterone C_(ave) range can vary depending on the subject and hisparticular needs and physiological parameters. In one embodiment, thetarget serum testosterone C_(ave) range can be about 300 ng/dL to 1100ng/dL and is achieved by the method on or after day 84 following thestart of the initial regimen. In another embodiment, the target serumtestosterone C_(ave) range can be about 300 ng/dL to about 1100 ng/dLand is achieved by the method on or after day 120 following the start ofthe initial regimen. In yet a further embodiment, the target serumtestosterone C_(ave) range can be about 300 ng/dL to about 1100 ng/dLand can be achieved by the method on or after day 180 following thestart of the initial regimen.

The above described method can provide desirable pharmacokineticparameters based on administration to a group of subjects. In oneembodiment, the method of the present invention can be such that themethod can provide a serum testosterone C_(avg) in the range of 300ng/dL to 1100 ng/dL in 75% or more of hypogonadal males after 84 daysfrom the start of the initial regimen, based on a minimum group size of24 hypogonadal males. In another embodiment, the method can provide aserum testosterone C_(max) of 1500 ng/dL or less in less than or equalto 85% of hypogonadal males based on a minimum group size of 24hypogonadal males. In yet a further embodiment, the method provides aserum testosterone C_(max) in the range of 1800 ng/dL to 2500 ng/dL inabout 5% or less of hypogonadal males after 84 days from the start ofthe initial regimen based on a minimum group size of 24 hypogonadalmales. In yet a further embodiment, the method can provide a serumtestosterone C_(max) of 2500 ng/dL in about 1% or less of hypogonadalmales after 84 days from the start of the initial regimen based on aminimum group size of 24 hypogonadal males. In one embodiment, themethod can provide a steady state ratio of serum testosterone C_(max) toC_(ave) of 2.7 or less based on single subject administration.

The above disclosed methods provide for initial and maintenance regimensthat include daily dose amounts that can be provided as twice-a-dayadministrations or divided into multi-dosage administrations. When amulti-dosage administration is utilized to provide the daily dose amountof testosterone undecanoate the dosages can be equal or unequal and canbe administered with or without meals, depending of the designatedregimen. In one aspect, when the dosages, whether twice-a-day ormulti-time dosages, are administered with a meal or a snack the meal orsnack can include about 15 g to about 60 g of fat. In one embodiment,the method provides for administration of the daily dose during themaintenance regimen as including twice-a-day administration of thetestosterone undecanoate-containing composition in conjunction withmeals. In one embodiment, the meal administered with the testosteroneundecanoate-containing composition can have a total calorie content ofabout 350 and 1200 K calories with about 30% to about 60% of thecalories in the meal being derived from fat. In another embodiment, themethod can provide, at steady state, a dose-normalized serumtestosterone C_(max) of about 3×10⁻⁶ dL⁻¹ or higher when administered toa male subject with meals daily in two divided doses.

EXAMPLES

The following examples are provided to promote a more clearunderstanding of certain embodiments of the present invention, and arein no way meant as a limitation thereon.

Example 1 Testosterone Undecanoate Composition

A testosterone undecanoate containing composition was prepared by usingthe components set forth in Table I. The composition is prepared byweighing all of the components, except the testosterone undecanoate,into a clean stainless steel container and mixed together at about 50°C. to about 70° C., using a stirrer. The testosterone undecanoate (TU)is added and stirred into the mixture of other components until thetestosterone undecanoate dissolves. A predetermined quantity of thisfill material is disposed into a capsule (for example, hard gelatincapsule) to get the required testosterone undecanoate dose per dosageunit. The capsules are allowed to cool at room temperature, banded (ifrequired) and packaged in a HDPE bottle and tightly closed with anappropriate lid.

TABLE I Example 1 Composition mg/capsule Testosterone Undecanoate 200Solubilizer (e.g. Glycerides of coconut oil; 725 Capmul ® MCM)Dispersant (e.g. lauroglycol) 300 Dispersant (polyoxyl 40 hydrogenated50 castor oil or Cremophor ® RH40) TU- loading (wt %) of capsule fill =15.7%

Example 2 Testosterone Undecanoate Composition

A testosterone undecanoate containing composition was prepared similarlyto the method described in Example 1 using the components set forth inTable II.

TABLE II Example 2 Composition mg/capsule Testosterone Undecanoate 225Solubilizer (e.g. Maize oil glyceride) 260 Dispersant (e.g. lauroglycol)665 TU- loading (wt %) of capsule fill ~19.6%

Examples 3 & 4 Testosterone Undecanoate Composition

Testosterone undecanoate containing composition were prepared similarlyto the method described in Example 1 using the components set forth inTables III and IV

TABLE III Example 3 Composition mg/capsule Testosterone Undecanoate 200Solubilizer (e.g. Glycerides of coconut oil; 600 Capmul ® MCM) TU-loading (wt %) of capsule fill = 25%

TABLE IV Example 4 Composition mg/capsule Testosterone Undecanoate 180Solubilizer (Maize oil glyceride, Maisine 35-1) 600 TU- loading (wt %)of capsule fill = 23%

Example 5 Testosterone Undecanoate Composition

A testosterone undecanoate containing composition was prepared similarlyto the method described in Example 1 using the components set forth inTable V

TABLE V Example 5 Composition mg/capsule Testosterone Undecanoate 240Solubilizer (e.g. Glycerides of coconut oil; 200 Capmul ® MCM)Solubilizer (e.g. α-tocopherol) 490 Dispersant (for e.g. polyoxyl castoroil or 100 Cremophor ® EL) TU- Loading per caps TU- loading (wt %) ofcapsule fill = 23.3%

Example 6 Testosterone Undecanoate Composition

A testosterone undecanoate containing composition was prepared by usingthe components set forth in Table VI and a method similar to thatdescribed in Example 1.

TABLE VI Example 6 Composition mg/capsule Testosterone Undecanoate 200Solubilizer (e.g. Maize oil glycerides) 490 Dispersant (e.g. polysorbate80) 25 Solidifying agent (e.g. polyethylene glycol, 45 8000 or PEG 8000)TU- Loading per capsule = 26.3%

Example 7 Testosterone Undecanoate Composition

A testosterone undecanoate containing composition was prepared by usingthe components set forth in Table VII and a method similar to thatdescribed in Example 1.

TABLE VII Example 7 Composition mg/capsule Testosterone Undecanoate 240Solubilizer (e.g. Maize oil glycerides) 325 Solubilizer (e.g. oleicacid) 125 Solubilizer (e.g. Benzyl Alcohol) 50 Solubilizer (e.g.α-tocopherol) 75 Solidifying agent (e.g. PEG 8000) 45 TU-Loading percapsule = 28%

Example 8 Testosterone Undecanoate Composition

A testosterone undecanoate containing composition was prepared by usingthe components set forth in Table VIII and a method similar to thatdescribed in Example 1.

TABLE VIII Example 6 Composition mg/capsule Testosterone Undecanoate 240Solubilizer (e.g. oleic acid) 400 Solidifying agent-(e.g. PEG 45 8000)TU-loading (wt %) of capsule fill = 35%

Example 9 Testosterone Undecanoate Composition

A testosterone undecanoate containing composition was prepared using thecomponents set forth in Table IX and a method similar to that describedin Example 1.

TABLE IX Example 7 Composition mg/capsule Testosterone Undecanoate 240Solubilizer (e.g. Maize oil glycerides) 400 Solubilizer (e.g.α-tocopherol) 24 Solidifying agent-(e.g. Glyceryl 25 distearate;Percirol ® ATO 5) TU-loading (wt %) of capsule fill = 34.8%

Example 10 Testosterone Undecanoate Composition

A testosterone undecanoate containing composition can be prepared byusing the components set forth in Table X by a method as follows: Therequired quantity of the glyceryl distearate or glyceryl monostearateand the PEG 8000 are placed in a stainless steel container and heated toabout 50 to 70° C. to get a molten mixture. The testosterone undecanoateis added and stirred till it completely dissolves. A predeterminedweight of the molten mixture is disposed into capsules and allowed tocongeal at room temperature, banded and packed.

TABLE X Composition Example 10 mg/capsule Testosterone Undecanoate 100Glyceryl distearate (Percirol ® ATO 5) 200 or glyceryl monostearate PEG8000 50The oral dosage capsules of Example 10, which contains non-dissolved TU,can provide, upon single administration along with food to a human male,a testosterone undecanoate AUC that is about 20% higher as compared to acomposition that does not include the glyceryl distearate (Percirol® ATO5) or glyceryl monostearate.

The composition of Example 10 can also be optionally modified so that adispersant such as a disintegrating agent (e.g. Crospovidone at about150 mg for every 100 mg TU dose) can be uniformly suspended understirring in the molten testosterone undecanoate solution. Thissuspension can be further allowed to cooled and passed through ASTM 30mesh get granulates or particulates which can be either filled in acapsule or compressed to a tablet.

Example 11 Testosterone Undecanoate Composition

A testosterone undecanoate containing composition wherein at least 50%of the testosterone undecanoate is dissolved is prepared by using thecomponents set forth in Table XI and a method similar to that describedunder Example 1.

TABLE XI Composition Example 11 mg/capsule Testosterone Undecanoate 225Solubilizer (e.g. Castor Oil) 350 Dispersant (e.g. lauroglycol); 180Solidifying agent (e.g. PEG 8000) 45 TU-loading (wt %) of capsule fill =28.1%

Examples 12-19 Testosterone Undecanoate Compositions

Testosterone undecanoate formulations of Examples 12 through 19 wereprepared by using the components set forth in Table XII and by a methodsimilar to that described under Example 1. Additionally, indicatedamounts of the respective formulations were filled into hard gelatincapsules and the testosterone undecanoate release from capsules ismeasured using a USP Type-II apparatus at about 100 rpm in about 1000 mLof 8% w/w solution of Triton X100 in water, maintained at about 37° C.The results of the release testing are also shown in Table XII.

TABLE XII Capsule Composition mg/capsule Components/ Example ExampleExample Example Example Example Example Example Example Attributes 12 1314 15 15A 16 17 18 19 Testosterone 40 40 75 75 90 75 75 75 125Undecanoate Oleic Acid 227 — — — — — — Castor oil 175 — — 455 — —Lauroglycol 115 — — — — — Labrafil M2125CS 80 — — Maize oil glycerides —455 455 315 — 316 316 515 (Maisine 35-1) Polyoxyl 40 — 130 80 35 — 79 54112 Hydrogenated Castor Oil, (Cremophor RH40) Glyceryl distearate — — 5060 — — 25 (Percirol ATO 5) Polyethylene Glycol — — — 48 30 30 48 8000,Total mg per capsule 267 330 660 660 500 660 500 500 800 (mg) TU-loading (wt %) of    15%    12%  11.3% 11.3% 18% 11.3% 15% 15% 15.6%capsule fill TU released in 30 ~100% ~100% ~100%   30% 30%  ~78% 85% 32%  80% minutes (%) Time for 75% TU <120 <120 <120 <120 <120 <120 <120<120 <120 release (minutes)

Examples 20-25 Testosterone Undecanoate Compositions

Testosterone undecanoate formulations of Examples 20 through 25 wereprepared by using the components set forth in Table XIII and by a methodsimilar to that described under Example 1. Additionally, indicatedamounts of the respective formulations were filled into hard gelatincapsules and the testosterone undecanoate release from capsules wastested in about 1000 mL of 8% w/w solution of Triton X100 in water,maintained at about 37° C., using a USP Type-II apparatus at about 100rpm. The results of the release testing are also shown in Table XIII.

TABLE XIII Composition mg/capsule Capsule Components/ Example ExampleExample Example Example Example Attributes 20 21 22 23 24 25Testosterone 200 200 240 240 240 240 Undecanoate (TU) Maize oilglycerides — 490 464 464 304 (Maisine 35-1) Coconut oil glycerides — — —— 400 — (Capmul MCM) Alpha-tocopherol 510 — — 50 — 50 Benzyl alcohol — —— 25 50 Polyoxyl 40 — 25 — — — — Hydrogenated Castor Oil, Polyoxyl 35Castor Oil, 45 — — — — — Polyethylene Glycol 45 45 — 46 65 41 8000, USPTotal Fill wt. per 800 760 704 800 730 685 capsule (mg) TU- loading (wt%) of 25 26.3 34.0 30.0 32.9 35.0 capsule fill TU released in 30 43% 62%38% 32% <75% <75% minutes Time for 75% TU <120 <120 <120 <120 <120 <120release (minutes)

Examples 26-29

Testosterone undecanoate formulations of Examples 26 through 29 wereprepared by using the components set forth in Table XIV and a methodsimilar to that described under Example 1. Additionally, indicatedamounts of the respective formulations were filled into hard gelatincapsules and the testosterone undecanoate released from capsules wastested in about 1000 mL of 8% w/w solution of Triton X100 in water,maintained at about 37° C., using a USP Type-II apparatus at about 100rpm. The results of the release testing are also shown in Table XIV.

TABLE XIV Composition mg/capsule Capsule Components/Attributes Example26 Example 27 Example 28 Example 29 Testosterone Undecanoate 250 250 250250 Maize oil glycerides 486 937 410 939 (Maisine 35-1) Polyoxyl 40Hydrogenated 25 213 69 144 Castor Oil (Cremophor RH40) Glyceryldistearate (Percirol — — 32 67 ATO 5) Polyethylene Glycol 8000, 39 — 39— Total mg per capsule 800 1400 800 1400 TU-loading (wt %) of capsule31.3 18 31.3 18 fill TU released in 30 minutes <75% <75% <75% <75% Timefor 75% TU release <120 <120 <120 <120 (minutes) Note: Examples 27 and29 can optionally be disposed in a delayed release capsule

Examples 30-35

Testosterone undecanoate formulations Examples 30 through 35 can beprepared by using the components set forth in Table XV and by a methodsimilar to that described in Example 1. Additionally, indicated amountsof the respective formulations can be encapsulated in gelatin capsulesand the testosterone undecanoate release from the capsules tested inabout 1000 mL of 8% w/w solution of Triton X100 in water, maintained atabout 37° C., using a USP Type-II apparatus at about 100 rpm. Theresults of the release testing are also shown in Table XV.

TABLE XV Capsule Composition mg/capsule Components/ Example ExampleExample Example Example Example Attributes 30 31 32 33 34 35Testosterone 368 320 490 240 40 300 Undecanoate Maize oil 900 370 620404 — — glycerides (Maisine 35-1) Castor Oil — — — — 175 276 Lauroglycol— — — 115 184 Tocopherol 102 — — Benzyl alcohol — — 102 — — Polyoxyl 4046 25 — — — — Hydrogenated Castor Oil, Polyethylene 86 45 86 41 — —Glycol 8000, USP TU- loading 26.3 36.3 35.0 35.0 12.0 39.5 (wt %) ofcapsule fill Total Fill wt. per 1400 760 1400 685 330 760 capsule TUreleased in 62% <62% <75% <75% ~100% <75% 30 minutes Time for 75%<120 >120 <120 <120 <120 >120 TU release (minutes)

Examples 30 through 35 demonstrate the importance of the choice of thesolubilizers of the current invention and their levels to achievegreater testosterone undecanoate loading and yet maintain thesolubilization of the testosterone undecanoate in the composition and/orthe dosage form.

Examples 36 and 37 Testosterone Undecanoate Containing Compositions

The compositions of the current invention can be further adsorbed ontoone or more substrate materials such as, for example, lactose, magnesiumaluminosilicate, colloidal silicon dioxide, starch, microcrystallinecellulose, alkyl celluloses etc., whereby a free flowing powder/granuleform is obtained which can be used as a granules, or disposed intocapsule, or pressed into tablet. The amount of the substrate materialcan be from about 15% to about 40% of the weight of the composition. Inone embodiment, the amount of the substrate material can be from about20% to about 35% of the weight of the formed granule or powder. Themethod of making such adsorbed testosterone undecanoate compositions caninclude pouring the liquid compositions on the substrate material underand continuous mixing at room temperature or at about 50° C.-70° C.,depending on the composition. After cooling, the adsorbed compositioncan be disposed into capsule or pressed into tablet. Table XVIillustrates examples of the freely flowable adsorbed solubilizedtestosterone undecanoate compositions.

TABLE XVI Composition (% w/w) Components/Attributes Example 36 Example37 Testosterone Undecanoate 16 16 Maize oil glycerides (Maisine 35-1) 50— Castor Oil — 45 Sorbitan monolaurate (Span ® 20) —  5 Tocopherol  1 —Glycerylpalmito stearate  5 — Polyoxyl 40 Hydrogenated Castor Oil,  3 —Polyethylene Glycol 8000, USP —  4 Magnesium aluminosilicate 25 30(Neusilin ® US2)

Example 38 Stability of Testosterone Undecanoate Containing Compositions

A preliminary stability evaluation with respect to the change in potencyand/or appearance of the potential primary degradation products wascarried out with the compositions of Example 17 and Example 21, bothfilled in hard gelatin capsules at 200 mg/per capsule and 75 mg percapsules. The capsules were packed in HDPE bottles and staged forstability studies in the environmental chambers maintained at 25° C./60%RH. The primary degradation products were determined by a HPLC analysismethod after about three months' storage and the results shown in TableXVII.

TABLE XVII TU composition Degradant Example 17 0.15% Example 21 0.06%

Examples 39, 39A, and 40 to 47 Testosterone Undecanoate ContainingCompositions

Testosterone undecanoate-containing compositions (capsule fill material)were prepared by using the components set forth in Tables XVIII and XIX.It should be noted that Example 40 and 47 are expressed as wt % ofExamples 17 and 12 respectively. The compositions are prepared byweighing all of the components, except the testosterone undecanoate,into a clean stainless steel container and mixed together at about 50°C. to about 70° C., using a stirrer. The testosterone undecanoate (TU)is added and stirred into the mixture of other components until thetestosterone undecanoate dissolves. A predetermined quantity of the“capsule fill” was disposed into a capsule (for example, hard gelatincapsule) to get the required testosterone undecanoate dose per dosageunit. The capsules are allowed to cool at room temperature, banded (ifrequired) and packaged in a HDPE bottle and tightly closed with anappropriate lid.

TABLE XVIII Example Example Example Example Example CapsuleComponents/Attributes 39 39A 40 41 42 Testosterone Undecanoate, wt % 1414 15 18 18 Monoglycerides (e.g. maize oil monoglycerides, 64 75 63 6868 Maisine 35-1), wt % Hydrophilic surfactants (e.g. Cremophor RH40, 165 16 8 14 Cremophor EL), wt % Fatty acids (e.g. linoleic acid, Linolenicacid, — — — — — Oleic Acid), wt % Triglyceride (e.g. castor oil, maizeoil, borage — — — — — seed oil, lauroglycol, corn oil etc.), wt %Lipophilic surfactant (e.g. propylene glycol — — — — — monolaurate), wt% Solidifying agent (e.g. polyethylene glycol 8000), 6 6 6 6 — wt % % TUdissolved at RT 70-75 85-92 65-70 50-55 55-60 % TU undissolved fractionat RT 25-30 8-15 30-35 45-50 40-45 *It is noted that the compositionscan also include one or more components such as anti-oxidants (e.g. BHA,BHT, Ascorbyl palmitate, vitamin E or combinations), flavorings etc.

TABLE XIX Example Example Example Example Example CapsuleComponents/Attributes 43 44 45 46 47 Testosterone Undecanoate, wt % 2518 20 12 12 Monoglycerides (e.g. maize oil monoglycerides, Maisine 70 —— — — 35-1), wt % Hydrophilic surfactants (e.g. Cremophor RH40,  5 17 16— Cremophor EL), wt % Fatty acids (e.g. linoleic acid, Linolenic acid,Oleic Acid), — 53 52 88 — wt % Triglyceride (e.g. castor oil, maize oil,borage seed oil, — 12 12 — 53 lauroglycol, corn oil etc.), wt %Lipophilic surfactant (e.g. propylene glycol monolaurate), — — — — 35 wt% Solidifying agent (e.g. polyethylene glycol 8000), wt % — — — — — % TUdissolved at RT 40-45 100  100  100  100  % TU undissolved fraction atRT 55-60  0  0  0  0 *It is noted that the compositions can also includeone or more components such as anti-oxidants (e.g. BHA, BHT, Ascorbylpalmitate, vitamin E or combinations), flavorings etc.

The compositions of tables XVIII and XIX include descriptions of theamounts of testosterone undecanoate that is dissolved at roomtemperature (RT). The percent (%) of the undissolved testosteroneundecanoate in the composition at RT can range from about 5 wt % toabout 60 wt %. Examples 44 to 47 do not include a solidifying agent andthat about 100 wt % of the testosterone undecanoate is dissolved inthese composition. All Examples, except Examples 44 to 47, are free ofionizable fatty acids such as oleic acid.

Example 48

The clinical testing for the select inventive composition examples wereconducted in a randomized study in human subjects including hypogonadalmales having a pre-test screening serum testosterone concentrations lessthan 3 ng/mL (˜10.5 nmol/L). The study compositions were administeredorally with at least 240 mL of water about 30 minutes after starting astandardized meal (at least 30-35% fat) which was preceded by a fast ofabout 10 hours. The testing methodology allows for determining singledose pharmacokinetic profiles. Dose amounts as well as meanpharmacokinetic parameters from the testing are shown in the Table XX.

TABLE XX Example Attribute 15A Example 40 Example 41 Example 45 Example47 Total daily TU dose 360-460 430-460 430-460 600-650 240 administered,mg Mean C_(max) to mean 1.54-2.69 1.54-2.69 1.54-2.69 1.93 >2.84 C_(ave)ratio Dose-normalized 3 × 10⁻⁶ to 3 × 10⁻⁶ to 3 × 10⁻⁶ to 3 × 10⁻⁶ to1.6 × 10⁻⁶ C_(max), dL⁻¹ 7 × 10⁻⁶ 7 × 10⁻⁶ 7 × 10⁻⁶ 7 × 10⁻⁶

As can be seen from the data presented in Table XX, Examples 40, 41, and45 provide a higher dose normalized C_(max) and a lower C_(max) toC_(ave) ratio after single dose administration (one half of the dailydose) as compared to Example 47, which is a lower loading, fullydissolved composition.

Example 49

Examples 40, 41, 44, and 45 were clinically tested in a randomized studyin human male subjects, including hypogonadal males having pre-testserum testosterone concentrations less than 3 ng/mL (˜10.5 nmol/L). Theexample compositions were administered orally with at least 240 mL ofwater about 30 minutes after starting a standardized meal (at least30-35% fat) which was preceded by a fast of about 10 hours. The testingmethodology allows for determining single dose PK profiles. Dose amountsas well as mean pharmacokinetic parameters from the testing are shown inTable XXI.

TABLE XXI Attribute Example 40 Example 41 Example 44 Example 45 Totaldaily TU dose 430-460 430-460 632 632 administered, mgDose-normalized >1.9 × 10⁻⁶ >2.7 × 10⁻⁶ ≤1.63 × 10⁻⁶ ≤1.63 × 10⁻⁶C_(ave), dL⁻¹

As can be seen in Table XXI, the compositions of Example 40 and 41provide a desirable higher dose normalized C_(ave) (bioavailability)after single dose administration (one half of the daily dose) ascompared to Examples 44 and 45. It is noteworthy that the testosteroneundecanoate in Examples 44 and 45 is fully dissolved in the compositionat room temperature. Further, each of Examples 44 and 45 contain oleicacid, an ionizable fatty acid, and each is devoid of solids (i.e. asolidifying agent and/or undissolved testosterone undecanoate).

Example 50

Based on test results from Examples 40, 41 and 45 pharmacokinetic (PK)performance parameters related to target pharmacokinetic criteria in agroup of hypogonadal men with no dose titration (i.e. the maintenancedose is the same as the initial TU daily dose) were estimated. The datashown is based on normal patient distribution and a variability of about50%, although similar results are expected if the variability changes upto an additional 15%. The simulated PK performance parameters allow forthe C_(ave) and C_(max) to be measured on different days after day 84.Table XXII shows the estimated parameters for Examples 40, 41 and 45,including various daily dose quantities for the compositions andcapsules Example 40.

TABLE XXII Example Example Example Attribute/ 40A 40B 40C 40D 41 45Total daily TU 150 360-420 430 1000 340-400 632 dose, mg Target PKCriteria Group PK Performance Results C_(avg) in the range <75% >75%<75% <75% >75% <75% of 300-1100 ng/dL C_(max) is lessthan >85% >85% >85% <85% >85% <85% 1500 ng/dL C_(max) in the range  <5% <5%  <5%  >5%  <5%  >5% between 1800 and 2500 ng/dL C_(max) greaterthan  <1%  <1%  <1%  >1%  <1%  >1% 2500 ng/dL

Based on the results shown in Table XXII, it is evident that dosingbased on Example 40-B and Example 41 provide PK performance criteriawhich may not require individualized titrations of the daily dose.

Example 51

Based on test results from Examples 40 and 45, pharmacokinetic (PK)performance parameters were estimated related to target PK criteria in agroup of hypogonadal men using a dose titration metric of C_(ave) with asingle dose titration. The estimated data is based on normal patientdistribution and a variability of about 50%. Similar results areexpected if the variability in PK parameters and/or maintenance dosechanges by up to 15% or the selection of another relevant dose-sensitivemetric, such as C_(t), C_(max), C_(min), or the like. The simulated PKperformance parameters allow for the C_(ave) and C_(max) to be measuredon different days after day 90. Table XXIII shows the estimatedparameters for Examples 40 and 45, including various daily dosequantities for the compositions and capsules of Example 40.

TABLE XXIII Example Example 40A 40E 40D 45 Total TU initial Daily Dose150 360-460 1000 580-650 (IDD), mg Maintenance Daily Dose ±40 ±40 ±40±40 (% of IDD) PK Performance Criteria Group PK Performance ResultsC_(avg) in the range of 300-1100 ng/dL <75% >75% <75% <75% C_(max) isless than 1500 ng/dL >85% >85% <85% <85% C_(max) in the range between <5%  <5%  >5%  >5% 1800 and 2500 ng/dL C_(max) greater than 2500 ng/dL <1%  <1%  >1%  >1%

Based on the results shown in Table XXIII, it is evident that highloading testosterone undecanoate compositions, such as Example 40-E,meet target PK performance criteria with a single individualizedtitration of the daily dose into a maintenance dose in responders to theexogenous TU and who are in need of a dose change based on titrationmetric results.

Example 52

Based on test results from Examples 40 and 45, pharmacokineticperformance parameters were estimated related to target PK criteria in agroup of hypogonadal men using a dose titration metric of C_(ave) andtwo dose titrations. The estimated data is based on normal patientdistribution and a variability of about 50%. Similar results areexpected if the variability in PK parameters and/or maintenance dosechanges by up to 15% or the selection of another relevant dose-sensitivemetric, such as C_(t), C_(max), C_(min), or the like. The simulated PKperformance parameters allow for the C_(ave) and C_(max) to be measuredon different days after day 90. Table XXIV shows the estimatedparameters for Examples 40 and 45, including various daily dosequantities for the compositions and capsules Example 40.

TABLE XXIV Example Example 40A 40E 40C 45 Total TU Initial Daily (IDD)150 360-460 1000 580-650 Maintenance Daily Dose (% of ±40 ±40 ±40 ±40IDD) PK Performance Criteria Group PK Performance Results C_(avg) in therange of 300-1100 ng/dL <75% >75% <75% >75% C_(max) is less than 1500ng/dL >85% >85% <85% >85% C_(max) in the range between 1800 and  <5% <5%  >5%  <5% 2500 ng/dL C_(max) greater than 2500 ng/dL  <1%  <1%  >1% >1%

Based on the estimated values shown in Table XXIV, it is evident thathigh loading testosterone undecanoate compositions, such as Example40-E, meet target PK performance criteria with a two individualizedtitration of the daily dose into a maintenance dose in responders to theexogenous TU and who are in need of a dose change based on titrationmetric results.

Example 53

Based on test results from Examples 40 41, 44 and 45, pharmacokineticperformance parameters were estimated related to target pharmacokineticcriteria in a group of hypogonadal men using a dose titration metric ofC_(ave) and three dose titrations. The estimated data is based on normalpatient distribution and a variability of about 50%. Similar results areexpected if the variability in PK parameters and/or maintenance dosechanges by up to 15% or the selection of another relevant dose-sensitivemetric, such as C_(t), C_(max), C_(min) or the like. The simulated PKperformance parameters allow for the C_(ave) and C_(max) to be measuredon different days after day 90. Table XXV shows the estimated parametersfor Examples 40, 41, 44 and 45, including various daily dose quantitiesfor the compositions and capsules Example 40.

TABLE XXV Example Example Example 40A 40E 40D 41 44 Example 45 Total TUInitial 120 360-460 1000 350-440 580-650 580-650 Daily (IDD) doseMaintenance Daily ±40 ±40 ±40 ±40 ±40 ±40 Dose (% of IDD) PK PerformanceGroup PK Performance Results Criteria C_(avg) in the range of <75% >75%<75% >75% >75% >75% 300-1100 ng/dL C_(max) is less than 1500ng/dL >85% >85% <85% >85% >85% >85% C_(max) in the range  <5%  <5%  >5% <5%  <5%  <5% between 1800 and 2500 ng/dL C_(max) greater than  <1% <1%  >1%  <1%  <1%  <1% 2500 ng/dL

Based on the results shown in Table XXV, it is evident that high loadingtestosterone undecanoate compositions, such as Examples 40-E, 41, 44,and 45 meet target PK performance criteria with a up to threeindividualized titrations of the daily dose into a subsequentmaintenance doses in responders to the exogenous TU and who are in needof a dose changes based on titration metric results. As evident from theresults of the Examples in Tables XXII to XXV, upon each subsequenttitration, the compositions disclosed herein offer higher patient dosetolerance and increased chances of success to achieve serum testosteronein the eugonadal range.

Example 54 Clinical Practice Titration Metrics

Patient and physician-friendly clinical practice titrations metrics werederived from the titration node day PK measurements (C_(ave)) followingsteady state (>15 days) administration of the high loading testosteroneundecanoate compositions disclosed herein. It should be noted that asthe C_(ave) and C_(max) were observed to have a strong correlation, theC_(max) data could also be used to arrive at a similar clinical practicetitration metric. As noted above in the application, C_(t) is the serumtotal testosterone concentration upon single testosteroneadministration, after “t” hours post-dose of a typical single daily doseof a BID daily dose regimen on the titration node day. Table XXVI showsa titration table based on the titration metric C_(t) for various timepoints following administration.

TABLE XXVI Sampling Time “Up-titration” Ct “Down-titration” Ct “t”(hourspost-dose) limit (ng/ml) limit (ng/ml) t = 2 1.96 9.39 t = 4 4.12 18.08t = 6 5.46 16.37 t = 8 2.97 7.83 t = 12 1.35 2.93

For example, those subjects in a group of hypogonadal men, whose C2(i.e. Ct at t=2) is <1.96 ng/mL would have to be administered with ahigher (for e.g. from about 125% to 155% of the dose prior to thetitration) maintenance TU dose going forward (“up-titration) foreffective testosterone therapy. Whereas those subjects in a group ofhypogonadal men, whose C2 (i.e. Ct at t=2) is >9.39 ng/mL, would have tobe administered with a lower (for example, from about 45 to 75% of thedose prior to the titration) maintenance TU dose going forward(“down-titration”) for effective testosterone therapy. It should also benoted that the “t” can be within about 1 hour.

Example 55 Dosing Regimens for Effective Testosterone Therapy inHypogonadal Males

Dosing regimens were prepared based on simulated data from observedsteady state PK data in hypogonadal men assuming a normal patientdistribution and with variability of about 50% and a dose titrationmetric of C_(ave). Similar results can be expected if the variability inPK parameters changes by up to 15% using titration metric C_(t)relationship given in Table-XXVI. Safety assessment can be done any daythe C_(max) is measured for a testosterone product (typically, 84 daysfrom initial dosing). Similarly, efficacy assessments can be done anyday the C_(ave) is measured for a testosterone product (typically, 84days from initial dosing). The regimens are prepared based on theunderstanding that the C_(ave) and C_(max) can be measured on differentdays.

TABLE XXVII C_(ave) on Oral Total TU Maintenance Metric for efficacyC_(max) on safety Initial Daily No. of TU Daily Dose (as % serumassessment assessment Dosing Dose Dose change from total T, day, day,Methodology (IDD), mg Titrations IDD) (ng/mL) (ng/dL) (ng/dL) A 350-6503 ±25-55% Ct >300 <1500 B 580-650 2 ±25-55% Ct >300 <1500 C 360-480 1±25-55% Ct >300 <1500 D 350-420 0 ±25-55% Ct >300 <1500 E 650-900 3±25-55% Ct >300 >1500

Unlike the recommended imprecise oral TU dosing regimen for thecommercially available product Andriol®, the dosing regimen methodologydisclosed herein for subjects in need of dose adjustments (high or lowresponders, such as illustrated in Example dosing methods, A to D)includes appropriate initial daily dose, maintenance dose and titrationmetric result in effective testosterone therapy (C_(ave)>300 ng/dL) foroptimal efficacy, while maintaining the C_(max)<1500 ng/dL in order toprovide a better safety profile. It should be noted that dosing method Efor a compositions of this invention would require more than threetitrations which would generally be inconvenient, impractical, and maynot allow for high levels of patient compliance.

It is understood that the above-described various types of compositions,dosage forms and/or modes of applications are only illustrative ofpreferred embodiments of the present invention. Numerous modificationsand alternative arrangements may be devised by those skilled in the artwithout departing from the spirit and scope of the present invention andthe appended claims are intended to cover such modifications andarrangements. Thus, while the present invention has been described abovewith particularity and detail in connection with what is presentlydeemed to be the most practical and preferred embodiments of theinvention, it will be apparent to those of ordinary skill in the artthat variations including, but not limited to, variations in size,materials, shape, form, function and manner of operation, assembly anduse may be made without departing from the principles and concepts setforth herein.

What is claimed is:
 1. A method for replacement therapy in a male havinga condition associated with a deficiency or absence of endogenoustestosterone said method comprising: Orally administering to said male adaily dosing regimen of a pharmaceutical composition comprising about 14weight % (wt %) to about 35 wt % testosterone undecanoate and a carrier,that provides from about 430 mg to 460 mg of testosterone undecanoate tosaid male per day to provide a serum testosterone Cave in said male inthe range of from about 300-1100 ng/dL.
 2. The method of claim 1 whereinsaid carrier comprises a solubilizer and a dispersant.
 3. The method ofclaim 1 wherein said carrier comprises a solidifying agent.
 4. Themethod of claim 1 wherein said carrier comprises a monoglyceride.
 5. Themethod of claim 1 wherein said carrier comprises a diglyceride.
 6. Themethod of claim 1 wherein said carrier comprises a triglyceride.
 7. Themethod of claim 1 wherein said carrier comprises a fatty acid.
 8. Themethod of claim 1 wherein said carrier comprises medium chainmonoglycerides and diglycerides.
 9. The method of claim 1 wherein saidcarrier comprises a tocopherol.
 10. The method of claim 1 wherein saidcarrier comprises a hydrophilic surfactant.
 11. The method of claim 1wherein said orally administering is twice-a-day.
 12. The method ofclaim 1 wherein said pharmaceutical composition is disposed of in acapsule.
 13. The method of claim 1 wherein said daily dosing regimenprovides about 450 mg of testosterone undecanoate per day wherein saidabout 450 mg of testosterone undecanoate is provided as two unit dosageforms in the morning and two unit dosage forms in the evening.
 14. Themethod of claim 1 wherein said pharmaceutical composition has at least5% of the testosterone undecanoate not dissolved and at least 35%dissolved in said carrier.
 15. A method for replacement therapy in amale having a condition associated with a deficiency or absence ofendogenous testosterone said method comprising: Orally administering tosaid male a daily dosing regimen of a pharmaceutical compositioncomprising testosterone undecanoate and a carrier, said compositioncomprising from 50-86weight % (wt %) solubilizer, that provides about430 mg to 460 mg of testosterone undecanoate to said male per day toprovide a serum testosterone Cave in said male in the range of fromabout 300-1100 ng/dL.
 16. The method of claim 15 wherein saidpharmaceutical composition is disposed of in a capsule.
 17. The methodof claim 15 wherein said orally administering is twice a day.
 18. Themethod of claim 15 wherein said carrier has one or more of thefollowing: a fatty acid, a monoglyceride, a diglyceride, a triglyceride,and a tocopherol.
 19. The method of claim 15 wherein said carrier has ahydrophilic surfactant.
 20. The method of claim 15 wherein said carrierhas a solidifying agent.
 21. The method of claim 15 wherein said dailydosing regimen provides about 450 mg of testosterone undecanoate per daywherein said about 450 mg of testosterone undecanoate is provided as twounit dosage forms in the morning and two unit dosage forms in theevening.
 22. A method for replacement therapy in a male having acondition associated with a deficiency or absence of endogenoustestosterone said method comprising: Orally administering to said maletwice-a-day with a meal two unit dosage forms of a pharmaceuticalcomposition comprising testosterone undecanoate and a carrier, thatprovides about 430 mg to 460 mg of testosterone undecanoate to said maleper day to provide a serum testosterone Cave in said male in the rangeof from about 300-1100 ng/dL.
 23. The method of claim 22 wherein saidpharmaceutical composition is disposed of in a capsule.
 24. The methodof claim 22 wherein said daily dosing regimen provides about 450 mg oftestosterone undecanoate per day.
 25. The method of claim 22, saidcarrier comprising a solubilizer.
 26. The method of claim 22, saidcarrier comprising a dispersant.